Abstract: A wireless detachable conference telephone and particularly a conference telephone that has a plurality of wireless microphone seats detachable from a conference telephone main body. The conference telephone main body and the wireless microphone seats may be communicated through radio signals so that users can detach the microphone seats from the conference telephone main body and move the microphone seats closely to input audio voice so that poor conversation quality resulting from distant conference telephone may be prevented from happening.

Abstract: A transfer connection device for wirelessly connecting mobile phone and hand-free handset has a first connector and a second connector to respectively couple with a hand-free handset and a mobile phone to allow signal transmission between the hand-free handset and mobile phone accomplished in a wireless fashion without the tangle and inconvenience of physical linking line between the mobile phone and the hand-free handset.

Abstract: A radio signal relay for extending effective transmission distance of radio signals consists of a receiver and transmitter, a signal processing unit, an input output bus unit, a processing unit, a memory unit, a signal amplification unit and an antenna. The radio signal relay is adaptable for use in transmission modules of telephones, information peripherals, modem transmission and the like to extend the effective radio transmission distance.

Abstract: A sound-activated song selection broadcasting apparatus allows users to retrieve and broadcast desired music or songs quickly without repeatedly trial-hearing or wasting time. The apparatus consists of a processing unit, an audio recognition search unit, a sample learning unit, a music processing unit, a human machine interface, a music storing unit, an audio input unit and an audio output unit. Users can find out and retrieve the desired song quickly without trial-hearing every song individually.

Abstract: An extension device adapted for speedy connection of various types of hand free devices for cellular phones to service centers is mainly made up of a control unit, a power supply processing unit, a press button unit, a data storage unit and a dialing unit. Alternatively, an infrared receiving unit in cooperation with an infrared transmitter can be added thereto. Thereby such an extension device enables all types of hand-free devices for cellular phones to be quickly connected to service centers in request for required services.

Abstract: An improved detachable conference telephone and particularly a structure allowing microphone seats to detach and separate from the conference telephone main body. The structure mainly includes a conference telephone main body to couple with a plurality of microphone seats linking by wire reels. When using in conferences, users may detach the microphone seats from the main body and move the microphone seats closely to input audio voice so that poor audio transmission resulting from distant conference telephone may be prevented from happening.

Abstract: A switching and retaining device applied to cellular phones and their peripheral communication equipment is provided. More particularly, it relates to a switching and retaining device that is coupled to a cellular phone and its peripheral equipment and can carry out telecommunication automatically between the cellular phone and its peripheral equipment. It is basically made up of a base mount with a retaining mount secured thereto and having a holding arm controlled to slidably extend and retract by way of a control unit. Inside the base mount is disposed a circuit set; and an input terminal, an output terminal and a power terminal are placed on the base mount and are coupled to the peripheral equipment of a cellular phone and a power source by conduction wires. On the retaining mount is disposed a receiving cavity for accommodation of a cellular phone with a signal plug and power socket positioned thereon for connection to the cellular phone and its peripheral equipment.

Abstract: An improved asymmetrical charger for charging a plurality of batteries of different capacity and voltage values, and automatically judging the residual power capacity and charge saturation level of every battery mainly includes a control unit, a voltage detection unit, a battery dock, an alternate power supply circuit, a current detection and rapid/slow charging switch unit, a battery detection unit, and a human machine interface. The battery dock is connected to a main circuit of the alternate power supply circuit, and connects in series at least one battery chamber which has two parallel circuits; one of the parallel circuits has a short circuit switch driven by the current detection and rapid/slow charging switch unit and another one of the parallel circuits has a positive conductor and a negative conductor to connect a battery thereby to provide a safe charger for charging batteries of different capacities without risking overcharge or undercharge of the batteries.

Abstract: A replaceable signal cable for connection of a specific type of cellular phone to a sound controlled or externally dialed hand-free system enables the hand-free system to be adapted for universal use on all types of cellular phones by simple selection of a proper signal cable in use. In other words, it relates more particularly to a signal cable for a hand-free system, which can be selectively replaced with ease so as to make all types of cellular phones universally adapted to one single hand-free system. The signal cable is equipped with a first connecting plug coupled with a cellular phone and a second connecting plug connected to a hand-free system. A dial-decoding IC or circuitry housed in either the first connecting plug for a cellular phone or the second connecting plug for a hand-free system is adopted according to codes set by a standard communication protocol for each type of cellular phone.

Abstract: The disclosure relates to an infrared controlled hand-free operator for cellular phones housed in a vehicle. More particularly, it is concerned with a hand-free operator which can automatically transmit an infrared signal similar to a control signal of a vehicle's audio stereo system to turn the stereo system off or mute when income signals are received by a cellular phone mounted to a vehicle. The hand-free operator thus can automatically cut off the noise sound of an audio stereo system in operation so as to make the operation of a cellular phone free of interference in a vehicle on the move.

Abstract: A universal hand-free system for use with various types of cellular phones produced by different manufacturers is designed to operate in combination with a vehicle's audio stereo system. The hand-free system can automatically turn off a vehicle's audio stereo system when incoming signals are being received by a cellular phone and automatically turn on the audio stereo system as the cellular phone terminates its operation. It intends to improve the communication quality of a cellular phone and increase driving safety. Moreover, by means of signal cable, which can convert and discern incoming signals and signal criterion levels for various types of cellular phones produced by different manufacturers, the hand-free system can be universally applied to a variety of cellular phones.

Abstract: A hand-free operator can be externally dialed via a dialing device. It is more particularly related to an external dialing device, which can be applied to all kinds of cellular phones. Thereby people do not have to keep telephone numbers in memory, they can make direct dials on a hand-free operator by means of telephone numbers stored in advance in a memory unit of a dialing device. It mainly houses a hand-free operator circuit and a dial processing unit in a hand-free operator embodiment that operate in collaboration with a signal cable and a dialing device (DTMF acoustic generator). It enables people to make a dial on cellular phones of all kinds via a hand-free operator without memorizing phone numbers or resorting to phone books, effectively facilitating the use of cellular phones and advancing driving safety.

Abstract: An electronic phone book dialing system is combined with a vehicle-installed hand-free system of a cellular phone. In particular, the dialing system can automatically dial out phone numbers including an extension number stored in an electronic memory unit. A person can make use of simple code names, personal names or phonetic sounds as indexes for locating telephone numbers stored in an electronic memory unit. Thereby, a person can make a hand-free system to automatically dial out a selected phone number with an extension in response to a person's simple selection of a representing code name, personal name or phonetic sound. It can thus facilitate a person to dial a phone number in driving.

Abstract: A signal wire connecting between a hand-free receiver and a mobile telephone includes a first side having a hand-free receiver plug co-operating with the hand-free receiver so as to be connected to the main circuit of the hand-free receiver, and a second side having a mobile telephone plug co-operating with the output receptacle of the mobile telephone so as to be connected to the mobile telephone. In such a manner, the mobile telephone plug includes a voltage control leg provided with a first branch resistor which is adapted to match the power supply circuit of the hand-free receiver to obtain the exact voltage supply value of the mobile telephone, which can be outputted to the power supply input leg of the mobile telephone to function as the power supply of the mobile telephone.

Abstract: An improved hand-free system for use on a cellular phone, and more particularly one hand-free system can prevent an automatically-operated antenna of a vehicle's audio stereo system from being unnecessarily actuated in response to incoming signals of a cellular phone. As a cellular phone is receiving incoming signals, a vehicle's audio stereo system in operation is automatically turned off or become mute, and the received voice signals of the cellular phone are amplified and broadcast via speakers of the vehicle's audio stereo system. At the same time, the antenna of the vehicle's audio stereo system remains in its current status without being actuated till the end of the operation of a cellular phone; afterwards, the audio stereo system is automatically started again.

Abstract: A universal hands-free receiver for a mobile telephone includes a base, an adjusting device slidably mounted on the upper portion of the base, an upper holder fixed on the adjusting device to move therewith and having an upper receiving space formed in the bottom thereof, and a lower holder fixed on the lower portion of the base and having a lower receiving space formed on the top thereof opposite to the upper receiving space. In such a manner, the adjusting device is able to move on the base so as to adjust the distance between the upper holder and the lower holder such that the distance between the upper holder and the lower holder is adjustable so as to suit the mobile telephones of different length.

Abstract: A universal handsfree set seat on which various types of mobile phones can be placed. The dimension of the rest section of the handsfree set seat is adjustable according to the volume of the mobile phone. The universal handsfree set seat includes a seat body, a clamping mechanism and a twin-head connecting plug for receiving and connecting with various telecommunication peripheral equipment.

Abstract: A portable telephone holder assembly has a radio/recorder equipment and an electric module disposed in the radio/recorder equipment. The radio/recorder equipment has a front plate and at least an electric communication terminal socket. The electric module has a sound source select switch, a pre-amplifier, a power amplifier, a compact disk deck, a tape deck, a radio receiver, an antenna, a loudspeaker, a microphone, and the electric communication terminal socket.