Features Great Brightness: This concentrated light beam enables wider light coverage and high brightness, so you can clear see the object far away. Adjustable Focus: Moreover, the focus is adjustable, and there is also a blue lens, which will surely satisfy your various viewing needs. Simple Operation: Smart sensor ensures easy turning on without touching, and you can press the button for gear switching, quick in cooling. The USB Charging: Built in 3pcs 1800mAh battery support USB charging, it can work as power bank to provide your device with power supply. Wide Application: Allows for extensive application in maintenance, camping, construction, positioning, emergency repair, night running, etc. Specification: Item Type: Flashlight Material: Aluminum Alloy Battery: 3 x 18650 battery. Capacity: 5400mAh, that is, 3 x 1800mAh, shipped with built in battery. Focusing: Convex mirror telescopic focusing.  Package List: 1 x Flashlight 1 x USB Cable 1 x Lens Package List 1 x Flashlight 1 x USB Cable 1 x Lens