F21-2D radio remote control best for hoist and tow truck ,easy to operate to keep workers safety. Products Application: Hoisting appliance, electric vehicle, electric door, and for industrial wireless remote control use which under 4 control points etc, Breif Introduction Transmitter Size:196*65*53mm weight:320g Receiver Size:171*86*85mm weight:550g Specification: control distance : up to 100m unique code : over 4.3billon unique ID codes . temperature : -35°C___+80°C Enclosure protection class : IP65 Transmitter power: DC3v Receiver powder : AC 380v/ 36v/220V or DC12V/24V output capacity: full sealed relay output with 5 amperes Standard configuration: One transmitter ; One receiver; One 1m cable connect with receiver One operation and maintain manual . Products Features: *Two dual speed push button + START +STOP+EMGS+SWITCH *control point upto 4 *With the battery voltage alarm device to cut off the circuit when voltage is insufficient. *with the Rotate key switchto guarantee the safety. *set the internal functions by computer interface *UP,DOWN push button can be set jump strokes,ordinary, mutual inhibition or not .