5V USB 4X AA Battery Waterproof Portable Charger Holder Power Pack Case Box Batteries NOT Included Description: 100% brand new and high quality. Aluminium alloy shell Power bank uses 4x AA batteries Output voltage 5V Suitable for charging other devices like bicycle light, USB fan, USB light, etc. Please Note: USB interface is output only and cannot be used for input. Specifications: Item Type: Portable Battery Charger Box Material: Aluminium Colour: Red Size: 3.5cm × 3.5cm × 6.5cm Cable length: 36cm Cable connector: USB Type A female Output voltage: 5V Battery: 4x AA batteries (Not included) Package includes: 1x Battery Charger Box (batteries not included)