Brand NO Model D501 Quantity 1 Color Blue + black Bluetooth Version V2.0 + EDR Operating Range 10 meter Compatibility V2.0 / V1.1 Microphone Yes Channels 2 Total Power 5W Impedance 4 ohm Signal to Noise Ratio(SNR) >=76dB Sensitivity 80dB +/- 2dB Radio N/A Supports Music Format MP3 / WAV / WMA Built-in Battery Capacity 540mAh Compatible With The laptop / notebook / tablet PC / cellphone with Bluetooth Other Features Interfaces: Micro USB TF card slot 3.5mm audio jack; Supports TF card up to 32GB (not included) can be as TF card reader as connect to computer; Bluetooth matching code: 0000; Communication protocol: HS / HF / A2DP / AVRCP / OPP; With volume control play / pause button; Built-in microphone supports handsfree; Charging voltage: DC 5V 500~1000mA; Charging time: 3~4 hours; Speaker: 1.5 x 2; Response frequency: 130Hz~18000Hz; Degree of distortion: THD Packing List 1 x Bluetooth speaker 1 x USB cable (28cm) 1 x English user manual