Dear: High Quality，wish you like it! Features:USB solar panel battery charger for Mobile Phones， MP3， MP4， iPhone， Nokia， etc.Using solar panel absorb sunlight and then transfer solar energy into electricity.Environmental protection: No pullution， no noise， no radiation.Can be used for small to medium pond， pool， fish tank.With compact design and built-in lithium battery， it is convenient to carry.Place it under the sun， it can keep your pond oxygenating.Note:Waterproof: The outer shell is moistureproof， waterproof design， but please do not soak in water.Charge: Please do not use any other external power supply except the solar panel. Please turn off the oxygen pump when charging.The charge controller will automatically shut down when the battery is full.Specifications:Solar panel: 5V/0.9WAir PUMP: 3V/1WAir output: 0.9-1.8L/minLithium battery: 3.7V 2200mAOutput: USB 2.0 5V/500mAInput: DC 0.5-1AProduct size: 16 * 7.8 * 3.5cmProduct weight: 296g/10.5oz，Package size: 17 * 9 * 6.5cmPackage weight: 335g/ 11.8ozPacking List:1 * Air pump & solar panel2 * Air stone2 * Air pipe1 * USB cable1 * User manual