Description Made of high-quality materials, practical, easy to operate and use, wide range of applications and long service life. Features: The transmitter has 8 function buttons (6 single-speed buttons + 1 start button + 1 stop button). The number of control points for a transmitter can be up to 8. The transmitter features a safety key switch to prevent unauthorized use. The transmitter can be connected to the computer through a data cable to set the button function mode. The transmitter has a battery voltage warning device that automatically shuts down the circuit when the voltage is insufficient. The nylon fiber shell feels comfortable, strong, drop-resistant, waterproof, anti-corrosive and insulating. The transmitter and receiver boards have crystal oscillators for stable performance. IP65 protection level, waterproof, dustproof, drop-proof, and can adapt to various environments. Using wireless antenna technology, the signal is stronger and the power consumption is lower. The external antenna avoids blocking signals from the body. The receiver is equipped with high-quality pure copper wire, 1.3 meters in length and 99.9% pure. The color is bright and clear, and it is equipped with U-shaped terminal blocks for convenient and quick wiring. 360-degree barrier-free remote control, 5.0 remote control system, strong penetration, no aiming required. Specifications: Main material: Glass fiber reinforced nylon Main color: Orange + Black Model: F21-E1B Transmitter: Protection level: IP65 Transmit power: 10dBm Battery: 2 * AA batteries (not included) Code: 32 bit (4.3 billion groups) Temperature: medium temperature Control distance: 100 meters Product size: 165*75*46mm/6.5*3.0*1.8in Product weight: 279g/9.8 ounces Receiver: Protection level: IP65 Reception range: 100 meters Sensitivity: -110dBm Code: 43 Billion codes, uncommon Temperature: Moderate Shock Capacity: 8 Amp Fully Sealed Relay Input Power: DC12-72V Product Size: 190*88mm/7.5*3.5in Product Weight: 655g/1.4lb Packing Size: 310*210*170mm/12.2 * 8.3 * 6.7 inches Packing weight: 1259 g/2.8 lbs Packing list: 1 * Transmitter 1 * Receiver 1 * Protective cover 2 * Fuse