Description: The use of advanced digital audio signal processing (DSP) technology and loop locked by FM modulation phase (PLL) to make the sound more realistic, more stable performance, long working hours without frequency compensation The LCD screen is more intuitive and accurate, with very low power consumption and minimal noise interference The operation of the integrated digital volume adjustment button of 16 can be completed easily All data is automatically turned off before the memory 100-year power error do not miss Multichannel audio input automatically changes When the light is on (with the back light button, the key does not work automatically Turn off the backlight 20 seconds, depending on the camera problem, LCD visual effect that the real photo is good) Applications: wireless FM audio, transmission USB audio PC, wireless microphones, maternal and child care Specification: Output power: 100 mW Audio frequency response: 50Hz-18 KHz Transmission frequency: 87.0 MHz-108.0 MHz Modulation modes: standard FM radio Channel: line / USB channel (stereo), microphone channel (mono) Equivalent noise:> 30 dB (sound close to CD quality) Supply voltage: DC 3.0 V-5.0 V Working current: 35mA Transmission antenna: 75 cm telescopic antenna Transmission distance: Standard 75 cm whip antenna, Tecsun Radio PL-660, measured 100 meters of open ground. Size Chart: Size: Approx. 26.5x49mm / 1.04x192inch Package Includes: 1 Piece DSP PLL Wireless Microphone Stereo FM Transmitter Module Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.