Streamlight Protac 2.0 Rail Mount HP, 2,000 Lumens, 85,000 Candela, Black, Includes Mounting Hardware, M-LOK Mount, Momentary Pressure Switch, (1) SL-B50 Battery pack, and USB-C Cord 89014 The ProTac 2.0 Rail Mount HP offers the perfect blend of power at 2,000 lumens and 85,000 candela. It features a tail cap switch for momentary or constant on operation and a port for an optional remote pressure switch. Powered by an SL-B50 battery pack that charges using a USB-C cord outside of the light or inside - no need to remove from your weapon.