Feature:
1.Fits any bolt with inside diameter 6.2MM,
2.Turn on and off easily
3.Battery life: up to 20 hours
4.Color :green.red.blue
5.The luminous light makes it easier to see
6.Lightweight and precision-balanced for superior accuracy
7.Piston switch and easy ON/OFF design
8.Waterproof and shock resistant design,Plastic nocks and stainless Piston
9.Shot placement recognition and arrow retrieval. Indexed nock end provides added safety.
10.Adjustable barrel end is easy to install and provides reliable performance fit