Brand N/A Model X5 Quantity 1 Color White + silver Bluetooth Version Bluetooth v2.1 Operating Range 20~40 meter Compatibility Compatible with Bluetooth v2.0 / v1.1 Microphone No Channels 2 Total Power 3W Impedance 4ohm Signal to Noise Ratio(SNR) >=75dB Sensitivity 80+/- 4dB Supports Music Format MP3 / MP4 Power Supply Built-in Battery Built-in Battery Capacity 600mAh Compatible With Iphone 4 / 4S / 5 Other Features Frequency response: 125Hz~16kHz; Interface: Mini USB Packing List 1 x Speaker 1 x Speaker stand 1 x USB cable (80cm) 1 x Chinese / English user manual