Feature:1. Echo cancellation and noise suppression (CVC) technology during call.2. bluetoothanswer, hang up, reject, redial, private answerand other functions.3. Support bluetooth stereo music playback.4. Support mobile phone navigation, support A2DP.5.Support to pair two mobile phonesat the same time.6. Support MP3/WMA music format.7. Automatic power off memory function.8. Support bluetooth power off automatically back.9. Support calling broadcast function.10. Support Chinese / English.11.Built-in solar panel for convenient using.Specification:Material: ABSColor: BlackCable Length: 50cmWorking voltage: 3.3V-4.2VPower consumption: 1WWorking temperature: -20-50 degreesFrequency response: 20HZ-15KHZbluetooth sound processing: A2DPbluetooth transmission distance: 10 metersCharging voltage: 5V/500mAWorking temperature: -20-50 degreesbluetooth version: V3.0+EDRCharging time: about 3 hoursCall time: about 8 hoursStandby time: 50 hours / 2 daysPackage Included:1 X Solar bluetooth Handsfree1 X Cable1 X User Manual1 X Holder Accessary