Brand GUCEE Model X1 Quantity 1 Color Black Bluetooth Version 3.0 + EDR Operating Range 10 meter Compatibility Compatible with Iphone / Ipad and other devices which support bluetooth stereo functions Microphone Yes Channels 2.1 Total Power 3W Signal to Noise Ratio(SNR) >/= 75dB Radio N/A Supports Music Format MP3 / MP4 Power Supply USB Built-in Battery Capacity 800 mAh Other Features Frequency: 100Hz~20KHz; Charging time: 2~3 hours; 6~8hours music playing time; Degree of distortion: 1% 1W / 1KHz Packing List 1 x Speaker 1 x USB cable (40cm) 1 x Strap (20cm) 1 x Chinese / English user manual