Motorcycle Car Racing Infrared Lap timers chargeable In Yellow

Infrared Lap Timer :  

 1>Infrared  Transmitter : working with  chargable Battery 

 2>Timer : (with Receiver ): working with 3.7 V 300MAH  Li-Battery . can be chargeable . Each charge can working 20 Hours. 

3>Used for Motorcycle / Auto racing timer .