Brand Nogo Model B2000 Quantity 1 Color Light blue Bluetooth Version 3.0 + EDR Operating Range 10 meter Compatibility 2.0 / 2.1 Microphone Yes Channels 1 Total Power 3W Signal to Noise Ratio(SNR) 85dB Supports Music Format MP3 Power Supply Built-in Battery Built-in Battery Capacity 400mAh Compatible With Bluetooth devices Impedance 4ohms Sensitivity Other Features Interface: Mini USB / 3.5mm; Single track; Power supply: DC 5V; Rated power: 3W; Frequency response: 100Hz~18KHz; Frequency range: 2.4~2.48GHz; Speaker unit: Diameter 40mm; SNR: 85dB; Distortion: 1% 1W 1KHz; Audio interface: 3.5mm; Rated voltage: 3.7V; Limited charge voltage: 4.2V Packing List 1 x Speaker 1 x Chinese manual 1 x English manual 1 x Audio cable (60cm) 1 x USB cable (61cm)