The Pro-Optic Target Edition Sight Light is the Ultimate in sight lighting. The Pro-Optic allows for full scale Brightness Adjustment for any kind of lighting. So weather you are on the 3d range, indoor shoot, or the trail head you can have optimal lighting on you sight pin. The Pro-Optic comes in a small sleek design with integrated Strap system that will fasten to your sight. Also with 8 programmable user-friendly settings the Pro-Optic unit can be set to a desired time setting for optimal balance of lighting and battery life. The unit comes with a Durable LED Module with built in connector system for easy installation. The Best part of Pro-Optic Series is that you will never have to buy another disposable battery again!!!! The unit is a Lithium-polymer rechargeable battery that charges in less than 3 hours and lasts up to 6 hours on the brightest setting!