a) This might be caused by weak welding between wire and monitor. Tighten the wire which is close to the screen and see if the screen flashes. If the screen flashes, please contact AUTO-VOX customer service team by email.

b) This might be a problem with car charger line interface. Please contact AUTO-VOX customer service team by email.

It would be better if you wrote the order number (from Amazon/Ebay/Website) in your email, so that we can handle the problem much more quickly.

This might be caused by not covering the USB port well. Please contact AUTO-VOX customer service team by email. It would be better if you wrote the order number (from Amazon/Ebay/Website) in your email, so that we can handle the problem much more quickly.

This might be due to insufficient current of charger.

a) Check the charger, it should be higher than or equal to 5V/1.5A.

b) Use the right charger to see if the problem is solved.

If the charger you use meets our requirement, please contact AUTO-VOX customer service team by email. It would be better if you wrote the order number (from Amazon/Ebay/Website) in your email, so that we can handle the problem much more quickly.

a) Check status of switch on the battery, it should be manually pressed after every charging.

b) This might be caused by losing pairing information, reconnect the device again.

If the problem persists, please contact AUTO-VOX customer service team by email. It would be better if you wrote the order number (from Amazon/Ebay/Website) in your email, so that we can handle the problem much more quickly.

In order to confirm and solve your problem as soon as possible, please contact our customer service team by email and reply to the following three questions:

1. What's the temperature in your area now?

2. How many times do you use the product per day?

3. Is the product fully charged? (the solar panel light turns green when the battery is fully charged.)

It would be better if you wrote the order number (from Amazon/Ebay/Website) in your email, so that we can handle the problem much more quickly.

This might be due to car charger breakdown. Please contact AUTO-VOX customer service team by email. It would be better if you wrote the order number (from Amazon/Ebay/Website) in your email, so that we can handle the problem much more quickly.

You don't need to take out the solar battery. There is a Micro USB port on the battery. You can easily charge your phone using the USB cable we provide and your cell phone's power adapter. The signal light will be green once it's fully charged (about 4 hours).