Technical specifications: 1. Wireless Version: 5.0 2. Support Profiles: A2DP,AVCTP,AVDTP,AVRCP, HFP,SPP,SMP,ATT,GAP,GATT,RFCOMM, SDP,L2CAP 3. Operation Distance: 10m 4. Transmitting Power: Class 2 5. Frequency Range: 2.402 -2.480 GHz 6. Speaker: Ø40mm 7. Impedance: 32Ω 8. TF card Supported: 128M-32G 9. Radio Frequency Response: 87.5-108MHz 10. Rechargeable Lithium Battery: 200mAh 11. Music Playing Time: 5h 12. Talking Time: 5h 13. Charging Time: 1.5h