USB rechargeable, this light uses a lithium-ion battery to power its four light modes: High, Medium, Low, and Strobe. There are also four different programs to personalize these modes and a full-time battery level indication for current use. The light accepts a standard AA alkaline battery when recharging is not an option. A removable pocket clip is standard too. IPX8 submersible. 5 1/8". Black.