1. Check if the adhesive tapes are peeled off from the botton of the microphones and the receiver so they can be actually charged.
2. Put the receiver in the charging case for 0.5-1 hour, whether it can be turned on normally.
3. Use 5V USB power supply like from your computer USB port to connect to the Type-C port at the bottom of the receiver and charge for 0.5-1 hour directly

1. Turn on the mics and receiver to check if they have sufficient power.
2. Press and hold the pairing button on the receiver and mic for about 3 seconds to enter the pairing mode.
Then the indicator on the receiver/mic will flash quickly. If both the blue light of the mics and the white light of the receiver stay, they have paired successfully.
Note: the receiver and mic need to be in the pairing mode at the same time.
3. Use mics and receiver within the line-of-sight recording range: 50m(164ft) in the line of sight.
4. Check if it enables OTG whe it's connected with the USB port on your phone.

1. Make sure the system pairs successfully by checkin if the blue light on the mic is solid on.
If not, follow the "It doesn't seem to pair successfully" question above to pair it up. 
2. It may take a few seconds for the App to recognize the device.
3. Try to unplug and plug the receiver back to your device again.

As long as your smartphone or even tablet has a type-c port, you can use either 1️⃣the included TRS 3.5mm to type-c or 2️⃣NOT included type-c to type-c cables (⚠️) to connect it to the M9 wireless lavalier microphone. Detailed setup video below for your reference.

1. Ensure the device has enough power and the adhesive tapes are peeled off from the botton the mics and receiver.
2. Ensure the system pair successfully by checkin if the blue light on the mic is solid on.
If not, follow the "It doesn't seem to pair successfully" question above to pair it up.
3. In order to play the recording, please unplug the receiver from the phone.

1. Check if the thick phone case causes the poor contact.
2. Make sure that the whole system has sufficient power and mics are not muted.

1. Make sure to use the included 3.5mm TRS-TRRS cable (with a phone label) to connect your Lightning-3.5mm adapter.
2. Check if you plug the TRRS end (three black poles) to your Lightning-3.5mm adapter, but not the TRS end.
3. It is recommended to use a Lightning-3.5mm adapter purchased from Apple.com because of the protocol of the lightning jack.
4. If you happen to have a Type-C to Lightning cable that's also from Apple.com, it will also work. Just plug the Type-C end into the bottom Type-C port of the M9 receiver, then plug the Lightning end to your iPhone or iPad. Though it's not wireless anymore in this use case. 

1. Make sure the system pairs successfully by checkin if the blue light on the mic is solid on.
If not, follow the "It doesn't seem to pair successfully" question above in the "First-time setup" session to pair it up.
2. Ensure that OTG of the phone is turned on.
3. Try to download software like Open Camera to record the audio while filming.