2. Operating voltage: 3. 3 V-4. 2V

3. Hours of service: about 60 hours

4. Battery capacity: 40mA/300mA

5. Length of use: 3. 5-4 hours

6. Bluetooth version:v5. 1+EDR

7. Transmission range: 2. 40 GHz-2. 48 GHz

8. Trumpet: 8-10 mm Copper Ring Composite Horn

9. Sensitivity: 98±3 dB

10. Communication distance: Effective distance 15 meters

Description of functions

Switch between Chinese and English,double-click the button when

Bluetooth is not connected.

1. The headphone pair is successfully operated (playing songs, calling,

etc. . ) .

2. Call: Bluetooth connection state, pull the phone short press answer,

long press 1. 5 seconds to release the refusal, short press hang up

under the state of the call, double-click the button to redial the most

recent call or unanswered phone number.

3. Song: Play the music interface in the connection state,short press a

button to pause, long press the left and right ears next.

4. Headphone power: Headphone voltage is less than 3. 3 V low power

prompt, less than 3. 2 V automatic shutdown,charging the headphone

less than 4. 0 V, 4. 2 V full.

5. UNCONNECTED,long press up and down,double-click back to pull,

three-click Wake Siri,four-click volume plus or minus.