If you are facing a low sound in your earbuds: 

• Make sure your Earbuds and the mobile device are within the 10m range to each other
• Low battery level may cause the disconnection from the mobile
• If the battery level is less than 5% charge the Earphones
• If the battery level is more than 5% proceed with the next step

To check Battery level 

• Go to settings of your Bluetooth device 
• Click on the Noise Buds VS402
• Check the battery percentage

a) Please ensure if device did not get connect to the previous input device.Ask customer to forgot or remove it from there

You can power off and on the device and voice prompt alert and LED response can let him/her know if the device is connected to any other device or not

b) Volume level need to check, and ask CX to set the desired volume level from Mobile Phone and ear buds both

Adjust the volume from Mobile Phone and ear buds both

c) If using online APP then suggest cx to check internet connection

Sometime, APP malfunction. Ensure good internet connectivity

d) If using online APP, please check it's compatibility with Mobile Phone and allow permissions from APP Manager in Mobile Phone

App setting can show supported Android or iOS versions

e) Mobile phone can also have issues in this case. CX can check if the device is working well with other mobile phone 

Apply the same connectivity process with different mobile phone as well

f) RESET the device 

1- Remove device name from Bluetooth Interface

2- Take out the earbuds from the charging case. 

3- Long press both the earbuds for 5 seconds. 

4- Place both the earbuds inside the charging 

 case and repeat the pairing process.