... SD/Udisk autoplay applying to,MP3/P4,laptop,etc speaker boxDigital Stereo Mini Speaker Support SD/MMC/CD/USB/MP3/MP4/PC3 ... ,laptop,etc,supporting SD/U disk autoplay ,50MM dual track speaker,touch-tone function select keybuilt in 750mAh rechargeable lithium cell ... and packages):0.28kg Quantity in each carton:50PCS/carton dimensions of master carton/weight:52*27*48cm/14.4kg 3 ...