PartyBox 400 portable bluetooth player is a set of two speakers controlled by a smartphone (bluetooth) or built-in buttons. Devices with 20W RMS power, gives us a working time of 4 to 8h. Speaker has the following functions: bluetooth, FM radio, USB pen drive, microSD card, AUX, KARAOKE. Multicolour RGB backlight works in several modes, giving an unforgettable visual effects. PartyBox 400 has a built-in Li-Ion 1200mAh 3.7V battery (rechargeable from micro USB). Frequency response is 40Hz-20kHz. Inputs: 6.3mm mono microphone socket, microSD card slot from which you can play mp3 files, USB socket to which you can connect a USB flash drive with MP3. USB(M)->microUSB(M) cable and AUX cable included. Dimensions: 400 x 165 x 155 mm.