EXMAX E260W 2.4G Wireless Portable Amplifier Dual voice coil speaker LCD Display Support FM MP3 Recording 18W Outpot power(Black) Supports the multimedia audio files play of USB flash disk/TF card with synonous lyric display. one button recording function for MIC voice and FM radio programs recording Supports FM radio reception,automatic station searching and saving Adaptive digital ID mode for automatic frequency matching between transmitter and receiver,multiple classrooms can use the same system simultaneously without mutual interference Built-in polymer lithium-ion rechargeable battery for both transmitter and receiver