?More Details:<br><br><br>Specification:Model number: BT-H108Bluetooth Version: 4.1Bluetooth Profiles: HSP｣ｬ HFP｣ｬ A2DP and AVRCP.Effective Distance: 10 metersFrequency Range: 2.4-2.48GHzFrequency Response: 100Hz-20kHzDistortion: \u22661%Microphone Sensitivity: -40dBMusic Time: 3-4 hoursStandby Time: 120 hoursBuilt-in Lithium Battery: 65mAhCharging Port: Micro USBCharging Time:  Approx. 1-2 hoursNet weight: Approx. 20gCable Lenth: 20CMOptional Color: Black｣ｬ Blue｣ｬ Pink｣ｬ Green.<br>Package Included:1 X Bluetooth Earphone1 X Charging Cable1 X English Instruction2 X Pair Earmuffs