HanRongDa HDR-831 Portable Stereo Digital FM Transmitter Mini FM Radio Station Broadcast with Mic Audio Launch 500 Meters TF Card Slot AUX IN Micropho

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.