Bluetooth version: Bluetooth V4.1, CSR solution, 
 Driver unit: 10mm 
 Operation range: 10 meters 
 Hardware Platform: CSR 8635 
 DSP Decoder: SBC, MP3, AAC decoder and 5-band fully configurable EQ 
 Multipoint Connection: Multipoint HFP & A2DP 
 Playing Time: About 4 Hs 
 Standby time: about 120 Hs 
 Charging time:  2 hours(maxium) 
 Frequency Response: 20 Hz-20KHz 
 Impedance: 32Ω±15%Ω (at:1000Hz 1mW) 
 Signal Noise Ratio: 93dB 
 Total Harmonic Distortion: <0.02% At1KHZ 
 Speaker sensitivity: 110±3dB (at:1000Hz 1mW) 
 MIC. Sensitivity: -40±2dB (at:1000Hz 2.2KΩ 3V) 
 Battery: Rechargeable 3.7V 70mAh Li-polymer battery 
 Battery Charging: DC 5V 500mA, 2 hours 
 Dimension: 580 mm(Length) 
 Net Weight of single set: About 15g