CISNO Tactical Flashlight with Battery Set, L2 Bulb High Lumens Flashlight with Mount Remote Pressure Switch (18650 Battery and Charger Included), Matte Black 1000 lumens output(Max) Operate Voltage: 3.7V Batteries: 1x18650 battery(battery included) Switch 1: Tailcap On/Off Switch 2: Light momentary on switch by pressure pad Waterproof, use it in rainy day, no problem ; Mount: Aluminum Alloy Suitable for 25mm Flashlight & Laser Sight Tube mounting need Flashlight Mount can also be installed on standard Picatinny rail/Weaver rail, fully adjustable with nuts & screws included Complete solution for mounting flashlight & laser Sight on rifle