KDS-500 used to under 3.2A Ac side motor, Include remote control and UPS both function. Without city power, still can open and close the door. (Can switch to universal match function; 1.suitable for fixed code, million group leaning code, rolling code, most remote of market. 2. Be in common use as the ups of sliding door, garage door, retractable door, industrial door, ect. under current 3.2A .)