Parameter:1. Drive: 40mm2. Impedance: 32 OHM3. Bluetooth version: Bluetooth v5.04. Bluetooth use frequency band: 2.4GHz5. Bluetooth distance: 10 meters without barriers6. Frequency response: 20-20000Hz7. With A2DP/AVRCP high-quality stereo audio transmission and remote control protocol8. Charging time: 2 hours9. Talk time: about 12-18 hours10. Music time: about 12-18 hours11. Standby time: about 240 hours12. capacity: 400MAHThe package includes:1*Bluetooth headset1*Data cable1*audio cable1*InstructionPrecautions:1. After the Bluetooth headset enters the pairing mode, if there is no pairing connection operation, please turn off the device to avoid power consumption.2. Do not perform other operations when searching for Bluetooth to prevent program errors.3. Please select an appropriate volume during use to prevent damage to the ears.4. Please pay attention to the good use of Bluetooth headset to avoid damage to the headset.5. If the headset has not been used for a long time, please charge the headset once before using it.