KEY FEATURES Bluetooth version: ISSC4.1 + EDR.Support Profiles: HSP, HFP, A2DP, AVRCP. Profile and Advanced Audio Distribution Profile(A2DP). Operation Distance: 10m. Transmitting Power: Class 2. Frequency Range: 2.4026 GHz-2.480 GHz. Resistance: 32ohm. Sensitivity: 105dB+ / - 3dB. R