DC 5V USB 17Keys-Music Controller Features: RF Remote control,long distance,mini size,wire connection is simple and very easy to use; Support almost every kind of one-wire or two-wire LED-DRIVER-IC ;(Can be customized) With 358 kinds of patterns,which are vivid and beautiful; Each controller can control up to 2048 pixels; With user setting saving functionality; Brightness adjustable. Preventing reverse connection of power supply. working voltage:USB5V Package includes: 1* DC 5V USB 17Keys-Music Controller (not including battery)