1.It's the usb mini speaker music box for motor. 2.you can listen music and put something in the box. Usb mini speaker music box for motor features:1. The new generation digital electronic products support MP3, FM radio and remote control operations.2. The cyclic playing and power outage memory functions may be provided.3. U discs and micro SD (TF) cards may be supported and the high quality digital receiving modules (76   -108MHz) may be selected for the FM function.4. The wide voltage input (DC10-17V) may be suitable for motorcycles and electric vehicles.5. The products may be initiative in China. The patent number is ZL 2010 2 0237460.3  The product technical parameters:1. Rated voltage: DC12V2. Working current: ≤2A3. Static current: ≤7mA4. FM frequency scope: 76—108MHz5. Output power: 30W+5W*26. Horn impedance: 4Ω                                                   Two keys and Two remote controls                                         you can insert U discs and micro SD card here                                                        when you open the box,you will see it                                                                   the  box                                                   the box in a carton                                                                   carton  

radio tail box with usb socket and micro sd card