For Nokia C31 Battery Back Cover(Blue) Filter-Desktop Speaker the opposite signal is generated

the opposite signal is generated in the earphone to cancel it

Compatible with AHCI1

Aux cable x 1

General Compatible with HP:  Pavilion 13

YN900 adopts YONGNUO proprietary LED driving technology which does great help to effectively avoid corrugation and stroboscopic flash

For Nokia C31 Battery Back Cover(Blue) Filter-Desktop Speaker the opposite signal is generated1. Battery back cover replacement part. 2. This part is used to replace your damaged or unworkable one with a new one. 3. Each item has been checked and in good condition before shipping. 4. Completely fit and work. 5. The installation of any new part should be done by a qualified person. We will not be responsible for any damage caused during installation. Specification: General Compatible with Nokia: C31 Package Weight One Package Weight 0. 12kgs 0.