Check the listing for details. F21-E1B Wireless Industrial remote controller switches Hoist radio Control Crane. Condition: New. Listed at 54.69 USD. Features: 1.Feeling flexible with Up/down, East/ West, South/ North can be programmed to interlock or non-interlock. 2.Feeling trustworthy with transmitter and receiver labels use laser engraving technology. Waterproof, wear-resistant, clear writing, avoiding the important information is missing in harsh environments as codes and other issues. To provide more superior service for future use. 3.Feeling unique with special button materials and high-quality switches. 4.Feeling safe with Power supply alarm indicator. Application: Bridge Crane / Overhead crane / Chain Hoist / Monorails / Concrete Pump Truck / Mobile Lifting / Tower Crane Specification Receiver F21-E1-RX Receiver power supply DC12V, AC24V, AC36V, AC48V, AC220V, AC360V Material Glass-Fiber PA Dimension 205*88*80mm Weight 630g 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 0.9 meters Safety code 32 bits (4.3 billion) Receive distance Approx 200m Transmitter F21-E1B TX 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 Weight 320g (without batteries) Power DC3V 2xAA battery (not included) Protection Class IP65 Frequency range VHF: 310~331MHz; UHF: 425~446MHz Transmitter power