Feature: 1. Code matched wirelessly 2. Each transmitter has a unique identity code of its own 3. The receiver will search and bind with the nearest transmitter while pressing the code match button on it 4. There is no need to match again in future use once it matched successfully 5. 2.4GHz FHSS system, LCD screen, 10-model memory, Channel 4 6. Receiver with built-in gyro Specification: RadioLink RC4GS 2.4GHz 4CH Remote Control System Transmitter & R6FG Receiver with Gyro for RC Crawler Car Boat ​Features: Code matched wirelessly Each transmitter has a unique identity code of its own The receiver will search and bind with the nearest transmitter while pressing the code match button on it There is no need to match again in future use once it matched successfully 2.4GHz FHSS system, LCD screen, 10-model memory, Channel 4 Receiver with built-in gyro R4GS Specification: Power Supply: 2S-4S Lipo Battery Operate current: lower than 80-120mA. Distance: more than 400M ground. LED screen: 128 * 64 resolution, LCD back light. 10 modes memory storage Size: 213 * 117 * 115.5mm R6FG Specification: Frequency: 2.4GHz ISM band (2400MHz~2483.5MHz) Size: 35 * 20 * 13mm Channel: 6 Model: cars / boats Modulation mode: GFSK Spread spectrum: FHSS 10 modes memory storage Antenna length: 200mm Control distance: more than 400 meters LCD screen: 128 * 64 resolution, LCD back light Power supply: 4.8~10.0V DC RF power: <10dbm Channel resolution: 4096 Work current: 30mA Compatible with transmitters: RC6GS, RC4GS, RC4G, RC3S, T8FB Package information: Package size: 26.5 * 20.5 * 14cm / 10.4 * 8.0 * 5.5in Package weight: 589g / 1.3lb General box package Package List: 1 * RadioLink RC4GS Transmitter 1 * R6FG Receiver 1 * English Manual Package List: 1 * RadioLink RC4GS Transmitter 1 * R6FG Receiver 1 * English Manual