Specifications: Laser class: IIIa Laser range：50-100m Material: high quality aluminum alloy Max. Output Power:＜5mW Weight: 28.6g Length: 30mm Wavelength: 625-650nm Features: Compact, small size, low profile Windage and elevation adjustable (wrench included) Easy operate On/off press-button switch in the back of the laser sight Detachable 20mm weaver rail, mounts securely onto standard pistol rail </br></br>Package Included: 1x Red Dot Laser Sight 1x Rail Wrench 1x Battery Wrench 1x Windage/Elevation Adjustment Wrench 6x Battery (EXTRA SET INCLUDED! - 2 total sets of batteries!) NOTE: The small adjustment hole on the top is for elevation adjustment(adjust up/down). The other one on the side is for windage adjustment(right/ left). </br></br>LIFETIME WARRANTY! Just send the product back and we'll refund you or replace with a new one! No questions asked!</br></br>PLEASE NOTE: These batteries only come with a partial charge and so the product may appear not to function properly when you first use it. Please charge the batteries using the battery charger provided in your package to ensure the best possible experience </br></br>IMPORTANT: Please be sure to install the battery cover set screw after installing the batteries to ensure the battery cover is secure!!