... speaker Trolley speaker pillow with Mini System, Wireless System,wireless fm Model:NDP-210Distortion: 0.1% Specification:Optional:wireless/buetooth/color ... and SD memory card function, Support MP3 music format2. With FM Radio, Guitar input3. With Karaoke function,2 microphone socket input4 ... input Trolley speaker pillow with Mini System, Wireless System,wireless fm