BSA Optics TWLLRCP 635nm Tactical Weapon Red Laser Sight with 160 Lumen LED Flashlight 635nm 2 x brighter than standard red laser 1 inch tube mount 1 - 3volt Lithium battery included (flashlight) 3 - 3volt CR123A batteries included (laserlight) Limited one year warranty Class 3R Laser Product (Does not exceed Class IIIA emission limits), 5mW power output