• 25 SELECTABLE CHANNELS IN THE UHF BAND. Frequency range: 672.5~684.5MHz. No worry of the interference from local radio stations and static. Available for several mics work together without interference. *Note: We don't recommend to use this mic with SMART PHONES, LAPTOPS, TABLETS, CAMERAS and IMAC, even with a proper adapter.
• FREEDOM OF MOVEMENT. Miniature wireless lapel microphone with clip offers low visibility and makes it simpler to move around. Reduction of cable "trip hazards". You can also have both hands free to present products or for demonstration. Perfect for live performance.
• UNIDIRECTIONAL LAVALIER MIC. Cardioid polar pattern rejects unwanted noise. Included windscreen also reduces plosives, wind and breath sounds. Clip it as close to under your chin as possible and with the top of the wind screen pointing up towards your mouth.
• EASILY CONNECT TO COMMON AUDIO EQUIPMENTS. Work with speakers, mixers, electric guitar amplifiers and sound boards that with 1/4'' interface to output the sound. Clear and strong vocals, perfect for stages, churches, meetings, presenters and lecturers.
• Unit comes with AAx2 for bodypack transmitter (with LCD display), and AAAx2 for the wireless receiver. The sturdy metal clip is easy to place and holds tightly.

https://www.amazon.com/Fifine-25-Channel-Transmitter-Performance-K037/dp/B06XXW1GTZ/