•Technical Parameters:1: Operating Frequency 2. 4GHZ-2. 480MHZ1: Compliant with Bluetooth V3, 5. 0 standards3: Supports Music, Continuous Playback for 10. 7m Hours4: Supports Calls: Built-in Microphone, Continuous Call for 4 Hours5: Supported Languages: Supports Chinese and English6: Wireless Connection Range: 100m7: Transmission Power: Glass28: Supports Headset & Handsfree Profiles9: Built-in Rechargeable Lithium Battery 180mAH8: Headphone Talk Time: 8 Hours Standby Time: 150 Hours9: Weight Only 50g, Suitable for Long Wear Without Fatigue; Packaging Information* Outer Box Size: 8. 8*7. 7*19cm