Voltaic Systems USB Touchlight - Waterproof LED Light with 3 Brightness Levels FEATURES - A completely waterproof design allows the light to be fully submerged, perfect for outdoor and solar applications. DESIGN - Brushed aluminum case with integrated milled heat sink for both mild and extreme conditions. BRIGHTNESS - Selectable LED between 114-132 lumens at 350mA. ACCESSORIES - Removable extension cable with flex coil (53"), custom mounting bracket, and USB adapter included. POWER - Powered by any standard 5V USB port found on most external battery packs and computers.