Wireless microphones are quite convenient for journalists, vloggers, and YouTubers. The Saramonic Blink 500 B4 is especially helpful as it lets you record two subjects to your iPhone and iPad. Its clip-on transmitters come with a built-in microphone and clip-on lavalier mic. The dual-channel receiver plugs directly into your device through Lightning interface.
The Blink 500 systems has a 24-bit / 48 kHz resolution. It has a range of 164ft (line-of-sight). You can operate up to 18 units in the same area.