Abstract: A transmission interface between at least a first module and a second module is proposed. The transmission interface includes at least two physical transmission mediums. Each physical transmission medium is arranged to carry a multiplexed signal in which at least two signals are integrated. The at least two physical transmission mediums include a first physical transmission medium arranged to carry a first multiplexed signal including a first IF signal and a reference clock signal. The first IF signal and the reference clock signal are at different frequencies.

Abstract: An athletic equipment with feedback device includes a main body; and a feedback device installed on the main body. The feedback device has a control unit; an input module for entering a target waving value; a sensing module for sensing the waving status of the athletic equipment and producing a sense signal; a signal processing module converting the sense signal into an actual waving data which is subsequently sent to the control unit, such that the control unit compares the actual waving date with the target waving value and sends a feedback signal; and a feedback module receiving the feedback signal and producing a feedback reaction to inform the user.

Abstract: A blue tooth communication system for a mobile device includes a mobile device and a cooperated device. The mobile device has a blue tooth module. The cooperated device has a blue tooth module and a radio emitting-receiving module. The blue tooth module of the cooperated device is in communication with the blue tooth module of the mobile device. A network is established between the user with the blue tooth communication system and different users with the same systems. The user is able to send messages, pictures and precise positions by using GPS. When there is no service signals for the mobile device, the system is used as a radio communication device.

Abstract: A laser adjustment apparatus includes a housing. A first cutout which has a through hole defined therein is formed in the housing. The first cutout is semi-spherical. Two screw holes are respectively defined in two sides of the housing. A holder is received in the housing. The holder has a second cutout formed therein and engaged with the first cutout. The second cutout has a semi-spherical shape. A laser module includes a light emitting portion and a tubular body connected thereto. The light emitting portion is received in the first and the second cutouts. A first and a second adjusting units are respectively passing through the two screw holes in the housing. The first and the second adjusting unit respectively perpendicularly abut against the tubular body of the laser module. A projecting angle of the laser module is adjusted by adjusting the first and the second adjusting unit.

Abstract: A calorie counting racket has a skeleton (10) with a hollow grip (11) and a counter unit (20) secured inside the grip (11) with multiple press buttons and a display (25) protruding from a side surface of the grip (11). The counter unit (20) has a microprocessor (21), a frequency counter (22) to record numbers of swings of the racket, a force estimating unit (23) to detect acceleration of the skeleton (10), a set of press button to control the microprocessor (21), and a display (25) to show calorie data. So that the calorie counting racket determine the burned calories immediately and precisely in accordance with different users.