Features; 1. 2.4G technology, FHSS 67 channels; in frequency spreading, highly resistant to anti-interference; prices. 2. The response time of the receiver is 2ms, providing fast response and better control. 3. Smooth and highly sensitive to input control and stable at distances from 200-300m. 4. Roacute compatible; suitable for cars; in RC, RC boats and tanks; in the Czech Republic. 5. With brake and crash protection function, out of control. 6. Each of the 4 channels; W can be set accordingly, supporting mixed 1 and 2 channel control. 7. Transmitter voltage range. 4.8V-6V warning voltage: 8. Receiver voltage range. 3.3V-6V, working current 30mA, support high voltage servos. Transceiver Specifications; in RC Radio: Channels: 4 Mode Type: RC Car Boat Tank RF Power: less than 20dbm Response Time: 10s-12ms Control Distance: about 200-300m Input Voltage: 4.8V-6Vor 1.5 aaax4 low Warning Voltage: 4.5V Net Weight: 260G Size: 180x80x145mm Receiver Specifications: Channels: 4 Frequency: 2.4GHz; Size: 16x18x12mm Package List; in: 1x transmitter 1x receiver Note: Batteries are not included. Trunk step 1. Connect; Accessory; Correct: the transmitter battery is powered and installed; Correctly. The receiver is not powered and the channel interface is properly installed. The transmitter and receiver have been successfully matched to Code 2. Turn on the transmitter 3. Turn on the receiver power and receiver; LED is always on