An excellent pocket light. The M1 2310 LED uses a 1 watt Luxeon module that's extremely bright and efficient. The compact CNC-machined aluminum body with knurled pattern (for a secure grip) is resistant to extreme temperatures. And the tactile response click tail switch turns it on for constant light or momentary blink. The M1 2310 LED comes with a free Cordura® holster with back-up battery pouch and 1 CR123 lithium cell.