Brand: PTron Colour: Black Battery: 500mAh Impedance: 4 ohms Charging Time: 2-3 Hours Speaker: 52mm 4ohms 3w Signal-to-Noise Ratio: >80db Speaker Size: 40mm 3W 52mm Working Voltage: 3.7V Micro USB Frequency Response: 20Hz-20KHz Bluetooth: v4.2 (Chipset JIELIAC6905B) Play Formats: WAV, MP3, APE, WMA, FLC Transmission Range: Up to 10m from the paired device Play-time: Up to 4 Hours depending on the volume level