CX0185W Features Power on/off just by a simple touch Freely adjust brightness by keeping touch of up to 3 seconds Built-in rechargeable lithium battery Charges via a USB cable Energy saving Lightweight for ease of carrying Suitable for both indoor and outdoor use General Specs LED Number 24 Charging Time 4-5 hours Working Time Max. Brightness: 5 hours, Min. Brightness: 30 hours Interface USB2.0   Dimensions 17.5 x 7.5 cm