1. Bluetooth version: V5.1 + EDR
2. Bluetooth mode: Hands free / headset
3. Power: 0.25MW-2.5MW
4. Transmission range:10meters
5. Working voltage / current: 3.7V/ 300mA
6. Charging voltage / current: 5V +0.25V/1A
7. Charging time: about 1-2hours
8. Standby time:688 hours
9. Call duration:about 48 hours (for listening to songs, about 36 hours)
10. Wireless frequency: 2. 402GHZ~ 2.480GHZ ISM Band
11. Support agreement: A2DP AVRCP HFP HSPTransmission
12. Intelligent reminder: voice prompts/ call number broadcast
13. Way for wearing: the style to hang behind ears and be plugged into ears
14. Battery type: 300mAh rechargeable lithium polymer battery
15. Charging power supply: AC input 110-240V DC output 5V/1A
16. Headphone net weight: 18g
17. Headphone size: 7*4.4*2.2cm

Packing list:
- Bluetooth headphone x 1
- Plug-in headphone x 1
- Ear cap x 2
- USB charging cable x 1
- User Manual x 1