1. Compatible with Mobile, MP3/MP4, laptop/desktop, iPod/iPhone.. etc. 2. . Available in any colors Output Power: 2.5W maxAmplifer: Class-D AmpFrequency Response: 100Hz-20KHzSignal To Noise Ratio >80 dBDistorion: < 10%Rechargeable Lithium batteryDimension : DIA.80X45H mm Protable Speaker