Wireless Industrial Remote Controller Electric Hoist Remote Control Winding Engine Sandblast Switches F21-2S ,Easy Operate

1.Have 3functionkeys(2single speedbuttons+1 stopbutton ). 2. Control contact is up to 4. 3. Small size for the installation of thght-spaces tailored 4. With battery voltage warning device, the power supply is cut off during low power. 5. Can be connected with the computer through the data line to set the keys( The program software /data lineneed to buy extra ) 6.Up/down can be programmed to interlock or non-interlock .