100% brand new and high quality Color: See pictures Material: Electrical components Package includes: 1Pcs Size: Approx 49x26.5mm Product Features: 1: The use of advanced digital audio signal processing (DSP) technology and FM modulation phase-locked loop (PLL) to make sound more realistic, more stable performance, long working hours without frequency offset. 2: LCD display is more intuitive and accurate, with very low power consumption and minimal noise interference. 3: Built-in 30 digital volume adjustment, the key operation can be easily completed. 4: automatic memory before power down the volume and frequency of information 5: multi-channel audio input automatically switches 6: High-precision SMD quartz crystal frequency stabilization, temperature, voltage changes the transmission frequency is no longer drift 7: supports serial command control Product parameters: Output power: 100mW Audio Frequency Range: 50Hz-18KHz Transmission frequency: Close campus radio 87.0MHz-108.0MHz, open campus radio 76.0MHz-108.0MHz Frequency adjustment step: 0.1MHz / second (short key press), 1.0MHz / time (long button press) Modulation modes: standard FM FM Channel: LINE / USB channel (stereo), MIC channel (mono) Equivalent noise: ≥30dB (sound close to CD quality) Supply voltage: DC 3.0V-5.0V Operating Current: 35mA Transmitting antenna: 75cm whip antenna Transmission Distance: FM transmitter module connected 75cm standard rod antenna with radio Desheng PL-660, open to the measured coverage radius of 100 meters. (Note: The transmission range is for reference only, because the environment is slightly different) Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item.