FM modulation mode with frequency range of 87-108MHZ 

Setting transmitter frequency by frequency adjustive button 

LCD-display indicates transmitter frequency and battery level for convenient operation. 

Automatic locking function to prevent changing transmitter frequency 

3.5mm audio input socket for supporting microphone signal input and line input, such as DVD, MP3 

Built-in intelligent charging circuit and lithium-ion battery for circularly recharging, fast charging time is about 4hrs and long playtime is about 10hrs. 

Long operating range up to 30m or more, matching with amplifier or FM radio which is with FM receiving function to achieve wireless amplifier function