Bluetooth

Description:

Model: Air31

Product Name: Air31 Crystal True Wireless Earphone

Bluetooth version: Bluetooth 5.3+EDR

Audio decoding protocol: SBC/AAC

Transmission range: 15m

Speaker type: coaxial dual moving coil

Mobile coil speaker specification: 8mm

Speaker sensitivity: 106 ± 3dB

Frequency range: 20Hz~20kHz

Music time: approximately 7 hours

Talk time: approximately 4 hours

Total working time: approximately 25 hours

Earphone battery: 30mAh

Rechargeable case battery: 300mAh, capable of charging headphones 4 times

Headphone charging time: approximately 1 hour

Charging time of the charging box: approximately 1.5 hours

Charging box input: 5V=0.45A

Earphone size: approximately 14.1x9.5x3.5cm

Single earphone weight: approximately 11g

Overall size: approximately 57.5x47.5x19cm

Addition: Fast charger cable with light for iPh, Type-C LeTV, Android micro USB

Q&A Troubleshooting

• Q:One bluetooth headset is not working!!!
• A:1. Check if the set mono output can be adjusted to both ear channels.
• 2. Check if one headset has run out of battery.
• 3. Check if two headsets are connected to two devices. You can turn off the connection to remove the Bluetooth headset from your phone's Bluetooth list. Re-pair the phone and play the audio again.
•  
• Q:Bluetooth headset not charging properly !!!
• A:1. The Bluetooth headset has been placed for a long time. If not used for a long time, the lithium battery inside the headset will be in the "sleep" state. As long as the charging time is more than 30 minutes, the headset will show the charging status. 
• 2. the headset has not been used for so long, charging more than half an hour does not show. Check if the headset charging cable plug is damaged, you can try other data cable. Or check if there is anything blocking the charging point of the headset. If there is, please use a toothpick to clean it.
•  
• Q:When I talk to my friend in a place with too much traffic, the headset can't hear the sound!!!
• Answer:It may be that your headset is not loud enough, which can affect the sound quality or prevent you from talking in places where Bluetooth signal is unstable.
•  
• Q:When making audio calls or playing music, the sound is very low or the sound does not match!!!
• A:You can increase the sound by adjusting the phone volume keys, music APP has a variety of sound settings, you can choose your own sound quality according to your personal preferences, so as to give full play to the role of HIFI.
•  
• Q: the headset is not worn firmly, always fall off!
• A:1. Please use the correct way to wear headphones.
• 2. Can follow the different sizes of ear caps.
• 3. Please do not wear in a very strenuous exercise.