Description: FM transmitter is a personal mini radio station, it can convert the audio signal of Tablet PC, Desktop, Notebook, TV and any other audio devices into high-fidelity wireless FM stereo signal, to transmit a signal in the room or the car, using FM radio as a receiver, so that any music can be transferred to your FM radio, you can enjoy stereo music without line trouble. High signal intensity and good sound quality, suitable for home, car, classrooms, auditoriums, dormitories, squares, etc. Features: Equipped with high-quality electronic components. Supports up to 20 hours super long working time. One button for mono / stereo audio channel exchange. 16 sound level can be adjusted. Comes with separate AUX input port, MIC input port and key lock function. Adjustable frequency 60-108MHz, can also set to fixed frequency. Speciallized antenna with stable transmission signal up to 500 meters. Suitable for tourist guide, training course, traveling, study activities, etc. Note: The transmitted signal will be affected by the surrounding environment, and the launch distance will be limited. Specifications: Model Number: HRD-831 Frequency Range: 60-108MHZ Frequency Stability: 10PPM Frequency Response: 50Hz-1500Hz Distortion Degree: 1% SNR: 60dB Suppored Format: MP3 Power Supply: BL-5C 3.7V 1000mAh Color: Black Item Size: 8.1 * 5.9 * 2.2cm / 3.18 * 2.32 * 0.86in Item Weight: 62g / 2.19oz Package Size: 17.7 * 12.2 * 5.0cm / 6.96 * 4.80 * 1.96in Package Weight: 203g / 7.15oz Package List: 1 * FM Transmitter (with battery) 1 * Antenna 1 * Microphone 1 * USB Cable 1 * 3.5mm Audio Cable 1 * User Munual (English)