Brand No Model D501 Quantity 1 Color Black Bluetooth Version V2.0+EDR Operating Range 10 meter Compatibility V1.1 Microphone Yes Channels 2 Total Power 5W Impedance 4ohm 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 All Cell phones/PCs/Tablet PCs with Bluetooth function Other Features Interface: Micro USB / TF card slot / 3.5mm jack; Supports TF card up to 32GB; Bluetooth pairing code: 0000; Communication protocol: HS/HF/A2DP/AVRCP/OPP; With volume control functions; Supports hands-free calls; Charging voltage: DC 5V 500~1000mA; Charging time: 3~4 hours Packing List 1 x Bluetooth speaker 1 x USB cable (28cm) 1 x English user manual