... speaeker Popular design rechargeable trolley speaker Wireless pa system with USB/FM radio/wheels/handle,trolly speaker Model:NDP-210Distortion: ... SD memory card function, Support MP3 music format2. With FM Radio, Guitar input3. With Karaoke function,2 microphone socket input4. Volume, ... bass, treble, echo, mic-volume separately control5. Compatible with PC/VCD/DVD/CD/TV and other audio input Wireless ...