TZWNS Adjustable Tactical Red Dot Sight Scope Picatinny-Weaver Rail Barrel Mount Pressure Switch CR123A Battery Charger Wavelength: 532 nm.Tube diamater: 26mm (about 1.02 inch), water-resistance standard and shockproof, designed with 3 modes. Advanced optics offer a very clear beams no matter in daylight or night.Windage and elevation adjustment High grade alumium construction Includes remote pressure switch and cord Sharp image point.Support the barrel, the diameter of 9.5 cm length which is just under 4 inches and 2 cm diameter which is a little under an inch Provide clear pionting dot even in day light and clear beam in the dark or low light,Length: 135mm?about 5.31inch), Height: 36mm (about 1.42inch)Power: &lt;1mW (milli watt)Aluminum alloy materials with rechargeable battery and charger ,powered by 1* CR123A battery(Included).2 different mounts,picatinny rail mount barrel clamp mount,obtained a new level of short / long range targeting ability Adjustable windage and evelation,dot daylight as 30-100 meters,can be reach 1500 meters at night.It's no problem seeing it a couple hundred feet away.Tube Diameter: 1'' Wavelength: 532nm.Emits a highly visible intense beam constantly Advanced optics give a superb sight,Self-locked Function: it designed with manual adjustment no need a wrench correction.2 switch provided, tail- cap switch and a pressure pad switch to control on/off.Two mounts: Picatinny-Weaver Rail Mount & Rifle Barrel Clamp Mount High grade alumium construction.sight w/pressure switch and "8"type 25.4X25.4mm Windage ,Aviation aluminum alloy material, not easy scratches.Through the button type switch one, Rat tail switch Our customer service team is ready to respond to your questions or inquiries within 24 hours.Such item built with high quality components and high-sensitivity sensors .we back it with 30-day money back guarantee, 12-month hassle-free replacement warranty and easy to reach, friendly customer support