PowerTac E5 980 Lumen LED Flashlight Weapon Kit includes LegionArms off-set Quick release mount and Remote pressure switch Utilizes a CREE XM-L2 U2 latest LED that enables the E5 to produce an amazing 980 lumen at the brigh Power on/off switch press the push button half way for momentary on To switch functions, turn the light on and press the side switch and release immediately The flashlight will access the mode last used. Includes LegionArms custom offset weapon mount and pressure switch