This is a very affordable wireless lavalier microphone from Pyle. It has a decent wireless range and the audio is not bad, for a wireless lavalier mic.
Available on Amazon.com – Wireless Clip Lavalier Microphone System – Portable Professional Clip Lav lapel Mic set with Volume Control, 20 ft range – Transmitter, Receiver, Battery – For Camera, Sound Recorder – Pyle Pro PDWM96