Description: Feature 1.Low power consumption is the core technology of the headset. It adopts an exquisite energy-gathering cabin design and a built-in large-capacity lithium battery to escort your headset 2.Surrounding directional sound field The speaker adopts physical ecological diaphragm technology 3.More safer to listen music outdoor sports Open ears also ensure the possibility of headphones in dangerous situations.It's safer to use. 4.HIFI Sound Effect HD surround Stereo Restore real sound 5.Wear comfortably without ear clips, protect ears from damage 6.Multi-function button, more convenient operation, IPX5 waterproof and sweatproof 7.Bluetooth 5.2 and 150mAh large-capacity battery, low-power chip performance is more stable, support up to 8 hours of calls NOTE:This is a bone conduction concept headset, not pure bone conduction, an ordinary speaker! Switch between Chinese and English: Do not connect the mobile phone Bluetooth, after turning on the phone, press the +- key at the same time for two seconds Specifications: Specification: Bluetooth chip: BK3266 stereo Bluetooth version: version 5.2 Bluetooth distance: about 10 meters Battery: 150MAH Charging time: about 2 hours Talking and listening time: about 8 hours Package size: 15.8*10.8*4.5CM Package weight: 71G Frequency: 20Hz-20KHz Impedance: 32 Sensitivity: 85dB/mW Waterproof rating: IPX 5 Package Included: 1*earphone 1*instruction 1*charging cable Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Please leaving a message before you give the bad feedback, if the products have some problems. Thanks for your understandings.