This is the Apple Watch (Series 3 38mm) Microphone Flex Cable (GPS + Cellular). Repair a damaged microphone with this brand new replacement. If your microphone is not working properly when using your series 3 watch, you may need a new one. The microphone is an important part of your device if you need to speak into your watch for texting or calling, you need a functioning microphone. Purchase this affordable replacement so you can get back to using your watch without any complications.