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

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.