1. 8 function buttons (6 single-speed buttons +1 start button +1 stop button)
2. Up to 8 control point
3. Secure key switch to prevent unauthorized use
4. Battery voltage warning device, when the voltage is insufficient automatically shut off the circuit
5. The button function mode can be set by connecting the data line to the computer
6. Up/down, east/west, north/south can be programmed to interlock or non-interlock, toggle and normal etc;
7. Start button can be program to be start, normal, toggle function etc.