ITEM NAME:Mini FM Microphone Module MIC Wireless Audio Transmitter Description: This product will be put the sound around the microphone into FM radio radio signals broadcast Reach pickup and wireless audio FM transmitter Product launch frequency is adjustable The green component on the core board is adjustable capacity Change the adjustable capacitor can change the transmission frequency Adjustable range covers the 88-108 mhz GB FM section You can use the radio and cell phone as a receiver This product is widely used in voice pickup transmission, audio MIC, sleep monitoring, and other suitable occasions Specification: Material: Acrylic Color: As Picture Show Length: Approx.30mm / 1.18inch Operating voltage: 0.7-9 v Frequency adjustment range: 88-108 mhz Transmission distance: 50-100 meters (9 v when using the 70 cm antenna conductors) Core board on the back marked with +, and MIER, which power cathode, anode and antenna terminal antennas are generally 0.7 m long. Package Includes: 1pc Core Board Note: Cell phone headset line is not recommended as a receiver SKU: DMO0012528773015399.Reach pickup and wireless audio FM transmitter. This product is widely used in voice pickup transmission, audio MIC, sleep monitoring, and other suitable occasions. Adjustable range covers the 88-108 mhz GB FM section.