lumenshooter u10 2000 lumens picatinny rail mount tactical flashlight, ar15 light with remote pressure switch, red and green filters, powered by 4800mah rechargeable battery lumenshooter this u10 tactical flashlight can be used as a standard flashlight or with a pressure switch. the pressure switch has two buttons; one is a standard on/off toggle and the other is a press-and-hold power button. the flashlight itself also has a button to toggle different lighting modes (low/med/high).comes with a rifle barrel mount,it is perfect for any rail system.if you want an affordable unit for night time home defense light, this is an excellent choice.