ULANZI UW-MIC 20P WIRELESS MICROPHONE FOR IPHONE (SKU.3078)

KeyFeatures.
Wearable and Portable Microphones:  For a truly wireless experience, conveniently attach a transmitter to whatever you're wearing via the integrated back clip without having to wire yourself or your talent. You can also hold the transmitter in your hand and use it as a handheld microphone.
The internal mic features an omnidirectional pickup pattern  that ensures reliable speech capture, even if mic placement is less than ideal; your subject's voice is captured with clarity, intelligibility, and consistency.