Feature: 1. Application: Suitable for electric cranes such as bridge cranes, top cranes, chain cranes, monorails, concrete pump trucks, mobile lifts, tower cranes, etc., and mini electric cranes. 2. Use With Contactor: The remote control needs to be used with a contactor, cannot be directly connected to the power supply. Direct connection to the power supply will damage the motherboard. 3. ABS Shell: ABS shell, comfortable to touch, strong and rolling prevention ability, waterproof, corrosion resistance and insulation. 4. Smart Wireless Technology: Smart wireless technology, the signal has non fear of interference, strong penetrating power, and stable signal. 5. IP68 Protection Level: This industrial remote control has an IP68 protection level, and the control distance is 100m in an open environment. Specification: Item Type: Industrial Remote Control Material: ABS Model: YU-2S Temperature Range: -5~85℃ Radio Frequency Point: 800MHz Protection Level: IP68 Control Distance: Approx. 100m / 328.1ft (In Open Environment) Adapter Battery: 1.5V AA Battery x 2 (Delivered without battery). Package List: 2 x Remote Control 1 x Transmitter 2 x Protective Cover2 x Fuse 1 x User Manual Note: Do not disassemble at will, there may be a risk of electric shock.