Feature: [Material]: Glass-Fiber PA .IP65 Waterproof: It can be used normally under harsh environment such as high oil pollution, high humidity and high dust. [Features]: With 8 function buttons ;Program the button function by computer software. [Control distance]: Approx 100m Strong penetrability without aiming.Up/down, east/west, north/south can be programmed to interlock or non-interlock,toggle and normal etc. [Safety]: the remote controller is equipped with a safety magnetic key switch for emergency use. The remote control has a battery voltage alarm device that automatically cuts off the circuit when the voltage is insufficient. [Application] : Bridge Crane / Overhead crane / Chain Hoist / Monorails / Concrete Pump Truck / Mobile Lifting / Tower Crane Specifications : Transmitter Number of function buttons: 6 x one-step buttons (Up/ Down, East/ West, South/ North) Other buttons: 1 x Stop button, 1 x Start button Material: Glass-Fiber PA Dimension: 164*75*46mm (in.) Weight: 315G (without batteries) Protection Class: IP65 Frequency range VHF: 310~331MHz; UHF: 425~446MHz Transmitter power: Less than or equal to 10dBm Safety codes: 32bits (4.3 billion) Temperature range: -40~85 degrees Celsius (-40~185 degrees Fahrenheit) Control distance : Approx100m Receiver Receiver power supply: AC/DC12-24V,AC/DC24-95V,AC36V,AC220V,AC380V Material : Glass-Fiber PA Dimension: 205*86*80mm (8.1*3.4*3.1 in.) Weight: 620G Protection Class: IP65 Temperature range: -40~85 degrees Celsius (-40~185 degrees Fahrenheit) Frequency range VHF: 310~331MHz; UHF: 425~446MHz Receiver sensitivity: -110dBm Cable length: 1.65 meters Safety codes: 32 bits (4.3 billion) Control distance: Approx100m Features: Remote Control Parameter:F21-TX/F21-RX Material:Glass-Fiber PA Protection level:IP65 Frequency range optional:VHF:310-331 MHZ Tranmitter power :<=10dBm Transmitter power supply :Two AA batteries(without include battery) Safety code:32 bits (4.3 billion) Temperature range:-40 C ~+85C Controlling distance:Approx 100M Transmitter parameter:F21-TX Receiver parameter:F21-RXC Receiver power supply optional :AC/DC12-24V,AC/DC24-95V,AC36V,AC220V,AC380V Receiver sensitivity: -110DBM Output contactor capacity :8 A sealed relay output warning device:The power supply is cut off during low power Note: The remote control needs to be used with the contactor. It cannot be directly connected to a power source. Connecting the power directly will burn the motherboard. Package Included : 1*Transmitter 1*Receiver 1*Dust Bag