Abstract: A wireless microphone device having a built-in memory element is provided herein. The wireless microphone device mainly contains a memory element for storing digital audio information. The stored audio information is retrieved and processed by a decoder element of the wireless microphone device, and then sent out via radio frequency signals by a transmitter element of the wireless microphone device. The audio information could be transmitted asynchronously or synchronously with a user's voice collected by the wireless microphone device. The transmitted radio frequency signals are then received by an external receiver device and played out via a speaker device.

Abstract: A microphone with sliding battery compartment is disclosed.

Abstract: A cabled and wireless dual-purpose microphone is comprised of a receiver containing a transmission baseboard, the baseboard connected to a receiving unit and to Type 1 adapter, a wireless connector containing a casing to accommodate a battery source, a primary end of the casing connected to Type 2 adapter relatively connected to Type 1 adapter in the receiver, an antenna being connected to a conductor; and a cabled adapter with its primary end provided with Type 2 adapter relatively connected to Type 1 of the receiver, Type 2 adapter being connected to a conductor, and a connector being connected to a terminal of the conductor to plug in an audio input of a sound system to function as a cabled, or a wireless microphone or to permit continue use by immediately switching to cabled microphone in the absence of voltage from the battery.