MingDe era Air31 Wireless Bluetooth 5.3 In Ear Transparent Earphones

Describe Bluetooth version. Bluetooth 5.3; Transmission range: 15m; Music time, approximately 7; Call time, approximately 4 hours; Total working time, approximately 25 hours; Rechargeable case battery, can charge the earphones 4 times; Headphone time, approximately 1 hour; Charging time for the charging case, approximately 1.5 hours; Earphone size: approximately 14.1x9.53.5cm; Single earphone weight: approximately 157.5x47.5x19cm; one Bluetooth earphone is not working; . check if the set mono output can be adjusted to two ear channels. 2. check if the battery of a headphone is depleted. 3. check if the two headphones connected to both devices, You can close the connection and remove the Bluetooth earphones from your phone's Bluetooth list. Pair your phone again and then play the audio again; one earphone is not working; 1. Bluetooth is left for too long. If not used for a long time, the lithium battery inside the earphones will be in a '" state. As long as the charging time exceeds 30 minutes, the earphones will display the charging status. 2, The earphones haven't been used for long and they don't show up even after charging for over half an hour. check if the headphone charging cable plug is damaged. You can try to connect a cable or check anything is blocking the charging point of the headphone. If available, please clean with a toothpick.