V19S Wireless Bluetooth Headset Digital Display With Charging Bin Mobile Power Function 1. Bluetooth version: 5.2 2. Transmission distance: about 10 meters 3. Support protocol: HEP\HSP\A2D\AVRCP 4. Frequency range: 20-20KHz 5. Sensitivity: 85dB 6. Speaker specifications: 32 ohms 7. Battery capacity: 220mAh for charging bin, 300mAh for headphones 8. Charging time: about 2h 9. Use time: about 68h 10. Charging interface: USB 11. Waterproof rating: IPX5 12. Material: ABS, silicone Features: 1. ENC call noise reduction, effective shielding the surrounding environment noise, suitable for a variety of daily use scenarios 2. Charging compartment can be charged to the phone 3. Exquisite and compact, easy to store and carry 4. LED digital display, clear power usage at any time 5. Comfortable to wear, according to the shape of the human ear, disperse the ear force points, not easy to fall off 6. Built-in optional axis, easy 180 degrees rotation, according to the wearing habits of any comfortable angle adjustment 7. Support caller announcement, driving or sports process without taking out the phone, you can easily answer the phone 8. Simple keys, convenient operation 9. Can be connected to two Bluetooth devices at the same time, switch to listen to music and answer the phone at any time