Operating Voltage: 12V-24V Features: The transmitter has 8 function buttons, including 6 single speed buttons, 1 start button and 1 stop button. The number of transmitter control points can be up to 8. The transmitter has a safety key switch to prevent unauthorized use. The transmitter can be connected to the computer through the data cable to set the button function mode. The transmitter has a battery voltage alarm device, and the circuit will be automatically shut down if the voltage is insufficient. The nylon fiber shell is drop-resistant, waterproof, anti-corrosion, and insulating. The transmitting and receiving boards use crystal oscillators with stable performance. IP65 protection level, waterproof, dustproof, drop-proof, can adapt to various environments. Using wireless antenna technology, the signal is stronger and the power consumption is lower. External antennas avoid shielding body signals. The receiver comes with a pure copper wire, 1.3m in length, 99.9% pure. The color is bright and clear, and it is equipped with U-shaped terminal blocks for quick wiring. 360-degree barrier-free remote control, 5.0 remote control system, strong penetrating power, no need to aim. Specifications: Main Material: Glass Fiber Reinforced Nylon Main Color: Orange + Black Model: F21-E1B Transmitter: Protection Level: IP65 Transmitting Power: 10dBm Battery: 2*AA batteries, not included Code: 32 bits, 4.3 billion groups Temperature: medium temperature Control distance: 100 meters Item size: 165 * 75 * 46mm / 6.5 * 3.0 * 1.8in Item weight: 279g / 9.8ounce Receiver: Protection class: IP65 Receiving range: 100 meters Sensitivity: -110dBm Code: 4.3 Billion Yards, No Common Temperature: Medium Temperature Shock Capacity: 8 Amps Fully Sealed Relay Input Power: 12V-24V Item Size: 190 * 88 mm/7.5 * 3.5 inches Item Weight: 655 g/1.4 lbs Package Size: 310 * 210 * 170mm/12.2 * 8.3 * 6.7 inches Package Weight: 1259g/2.8lbs Package List: 1 * Transmitter 1 * Receiver 1 * Protection Cover 2 * Fuse