True 360 soundAn omnidirectional acoustic deflector spreads sound evenly for consistent, uniform coverageWireless Stereo PairingIf you think one GoAudio speaker sounds great, you'll love how two of them sound together. Then turn things up, get a little crazy and dance like nobody's looking. Wherever you areLong Lasting Battery LifeRechargeable Lithium-Ion Battery for up to 24 hours of battery life between Micro USB charges. Actual battery life will vary with use, settings and environmental conditions. Charge time: 3 hoursSplash ResistantIPX4-rated water resistance, and more. So whether youre next to the pool or caught in a heavy rain storm, its not a problem for your musicRugged and DurableGoAudio is portable and durable, and fits easily into outdoor with youTechnical ParametersSize: 2.8 x 5.7 inchOutput Power : 2 * 6 WattsVoltage input : DC-5V / 2AFrequency Effects : 75 Hz-20000 HzBattery Capacity : 4400mAhRated Voltage : 3.7V