Bluetooth Version: V5.0Channel system: stereo (dual channel)Battery Capacity: 250mAhDrive Unit: 40mmProduct Weight: 270gCharging time: 2 hoursCall duration: 12 hoursMusic Duration: 15 hoursContract Support: HSP1.0 / HFP1.5 / A2DP1.0 / AVRCP1.3input loading pattern: DC 5V 300MAWorking frequency Bluetooth: 2.402G-2.480GBest distance conversation: <1 millionMaximum Transmission Distance: 10Mvoice prompt: supportmultipoint connection: SupportMethod dressing: head-mountedAttached Accessories: USB charging cable, audio cable, manual"1. Bluetooth headset2. Automatic conversion between phone and music selection up / down, play / pause3. High quality stereo sound, listening to music, shocking bass effect, clear communication4. Large battery capacity, low power consumption and long battery life5. Support display of energy IOS system6. With surround sound (soundtrack test: Cai Qin "Futou")7. switchable wireless wire"