Made of high-quality materials, it features high practicality, convenient operation, wide application range and long service life of 12V-24V. Features: The transmitter has 8 function buttons ( 6 single speed buttons + 1 start button + 1 stop button). The maximum number of control points for the transmitter can be 8. The transmitter has a safety key switch to prevent unauthorized use. The transmitter can be connected to the computer via data cable to set the button function mode. The transmitter has a battery voltage warning device that is insufficient to automatically shut down the circuit. The nylon fiber shell is comfortable, sturdy, drop-resistant, waterproof, anti-corrosion and insulated. The transmitter and receiver boards are equipped with crystal oscillators for stable performance. IP65 protection level, waterproof, dustproof, anti-drop, suitable for various environments. Adopting wireless antenna technology, the signal is stronger and the power consumption is lower. External antennas should avoid blocking signals from the body. The receiver is equipped with high-quality pure copper cables, 1.3 meters long and 99.9% purity. The color is bright and clear, equipped with a U-shaped wiring board for quick wiring. 360 degree barrier-free remote control, 5.0 remote control system, strong penetration, no need to aim. Specification: Main Material: Fiberglass Reinforced Nylon Main Color: Orange + Black Model: F21-E1B: 12V-24V Transmitter: Protection Level: IP65 Transmitting Power: 10 dBm Battery: 2 x AA Batteries (Not Included) Code : 32 bits (4.3 billion sets) Temperature: Average temperature control distance: 100 meters Project size: 190*88mm/7.5*3.5in Project weight: 655g/1.4 lb. Package size: 310*210*170mm/12.2*8.3*6.7in Package weight: 1259g/2.8lb Package list: 1*Transmitter 1*Receiver 1*Protective case 2* Fuses