Product Type: YT8K5S-Y button list: two five-speed rocker paragraphs, four metal buttons, an emergency stop mushroom head, a power switch system functional requirements? Description: Each remote control system includes a transmitter, a receiver device, and sets to work at the same venue will not interfere with each other. ? Four-speed function realization: all speed through the rocker achieve. For example: Gently push up is a file (1 speed), upward push, is in second gear (2 speed). . . . . . ? Receiver output switching capability: AC250V 5A, DC30V 5A. ? Receiver Operating voltage: DC12 / 24 / 48V, AC36V / 48/220 / 380V.