A19 true wireless Bluetooth headset

Bluetooth version: V5.0+EDR
Support: HFP1.7, 1.2, a2dp1.3, AVRCP1.6, SPP1.2andPBAP1.2,BDR/BLE
3. Bluetooth working frequency: 2.402-2.480ghz
4. Receiving range:≤10 m
5. Audio signal-to-noise ratio S/N: ≥100dB
6. Battery Battery: Lithium Battery -3.7V, 50mAh
7. MIC: silicon wheat, -42dB±3DB,
8. Call/play time: about 4-5 hours (actual use time depends on the type and volume requirement of the song, 80% volume)
9. Charging time: 1-1.5 hours for the earphone and 2 hours for the charging seat
Charging box parameters:
1: Charging voltage: 5V/ 0.75a
2: Charging port: USB
3: Charging the headset for 15 times
4: Capacity of charging warehouse: 2000MAH/Unwinding warehouse + flashlight function + hanging rope