•Technical parameters: 1: Operating frequency 24GHZ-2.480MHZ1: Compliant with Bluetooth V3.50's Standard 3: Supports Music, Continuous Music Playback for 10.7m Hours 4: Supports Calls: Supports Calls, Built-in Microphone, Continuous Call for 5 Hours 5: Supports Language: Supports Chinese and English 6: Wireless Connection Range: 300m 7: Transmission Power: Glass28 8: Supports Headset & HandsfreeProfiles9: Headphones built-in rechargeable lithium battery 180mAH: 10: Headphone talk time: 8 hoursStandby time: 150 hours11: Weight is only 50g, suitable for long-term wear without fatiguePackaging information*Outer box size: 46*43*43CM*Outer box packing quantity: 50 pieces per outer box*Outer box gross weight: 102KGS/box*Box size: 88*7.7*19cm