Features 1、Using optical lenses, the lens has multiple high throws and low throws, high transmittance 2、Multi layer coating lens, effectively improve system brightness, restore real color 3、With 40mm large mirror, the greater the objective lens, the more of the enters the light, the light is sufficient, the imaging is brighter 4、Living waterproof does not have to worry about accidental water, prevent moist weather in the air 5、Built in red green double light, eyepiece can be adjustable, suitable for harsh and poor environments outdoors Item Type: Single Tube Telescope Material: Aluminum Alloy Size: Approx. 31.3cm/12.3in Lavency: 3 to 9 Times Mirror Caliber: Approx. 40mm/1.6in Distance: Approx. 69.1 to 85.09mm/2.7 to 3.4in Pipe Diameter: Approx. 25.4mm/1in View: 13.41 to 40.38 at 100yds Guide: Approx. 20mm/0.8in Optic: Optical Glass Streaking: Differentiation Wire Coating Method: Blue Film Seismic or Not: Yes One Tube or Not: Yes The Perspective is Adjustable: Yes Waterproof Anti Fog: Yes Battery: CR2032 Button Battery (Ship Without Battery) Package List 1 x Single Tube Telescope with Cover 1 x Wipe Cloth 1 x English User Manual 2 x Mount 1 x Hex Tool