Work by 2xLR44 battery，(not included in the package when ship the item，because safe questions，thanks for understand)<br />For Gun Type: Handgun<br />Brand: Unbranded<br />Mounting: Rail<br />Model: red dot laser sight<br />Features: red laser sight<br />1. Red Laser Sight < 5mw<br />Tactical Low Profile Red Laser Sight for XDM XD 9 40 45 Pistol <br />Fit Compact size or Full size pistol under barrel must have rail<br />Compact， Low Profile， Matte Black. Weight:1.4oz<br /><br />Compact Red Laser Sight for XD， GLK， S&W， FN， or SIG<br />Windage & Elevation Adjustment ( Allen Key Included )<br />Horizontal ON / OFF SwitchNOTE:<br /> Work by 2xLR44 battery，(not included in the package when ship the item，because safe questions，thanks for understand)<br />Package including:<br />1x Red laser