Model: A100BLBluetooth version: 5.0Color: BlackOperating range:10 mSupport protocol: A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP, SMP, ATT, GAP, GATT, RFCOMM, SDP, L2CAPChannel system: Stereo 2.0Tenderness: 118+/-3DBCharging time: 2.5 hoursWorking time: 7-12 hDiameter: 40mmX2frequency range: 2.402~2.480GHz