IP4094B Features Excellent SRS stereo surround-sound  Gives out a colorful lights when it starts Compact size for ease of carrying Enters music mode when connected to a TF card or USB flash drive  Supports FM radio and comes with an antenna Optional track and volume adjustment Features a clock function General Specs Brand & Model TT-028  Material Transparent acrylic crystal and aluminum alloy  Audio Format MP3 FM Yes Battery External lithium battery Power Supply DC 5v Compatibility MP3/MP4 player， cell phone， PC， iPad Package Details Weight: 164.78 g Size: 7.8*5.5*5.5 cm