No standalone lithium batteries are sold with the product. It features a built-in, non-replaceable flat JL102025 lithium polymer pouch cell (3.7V, 500mAh), USB rechargeable
Highly Bright Green Beams - Bright and precision green laser sight, Safe beam intensity/wavelength: <5mW peak, 532nm, Class IIIA. Highly visible green laser in any environments which can reach up to 50-100 ft. during the day and up to 600-1000 ft. at night.
Shockproof Design - The beam sight is good at holding up to being knocked around a good bit and Keeping zero.
Ultra Low-Profile Design - You can attach the sight to the rail smoothly. One rubber button is so convenient and easy to turn on/off.
Easy Zero Adjustment - Slowly tune Elevation and Windage interactively with included Allen key. Noted please, only one direction may lock or damage the threads.
