Wireless Interview Microphone Adapter Handheld Mount Adapter

No need APP/Bluetooth, just turn on the TX-transmitter power, plug the receiver into the phone, you can complete the pairing. 
Wireless transmission, free to walk.

Use 2.4GHz transmission technology, strong anti-interference ability, effective identification of original sound, stable transmission of about 20 meters (65 feet) of high-definition audio content. (Test data in an obstacle-free environment)

The SX8 wireless lavalier microphone also features reverb & mute modes to meet your different recording needs.

Using omnidirectional microphone, 360 ° accurate radio, SX8 lavalier wireless microphone with noise reduction mode, according to the need to turn on / off. It can still record clearly in noisy environment.

Built-in high-capacity lithium battery, durable power, the transmitter can continue to work for about 8-12 hours. Special note: the receiver does not have a battery, no need to charge, working with the phone's power. If the phone is working with low power, you can charge the phone through the receiver port