Traditional remote control distance for helis and park flyers is about 250 meters,requiring a transmitter with 750mW transmitting power consumption. But 2.4GHz transmitter just needs 4mW power to perform at the same level.
2.4GHz uses binding or FSK,to prevent signal interference when flying in large groups.
2.4GHz remote control systems employ an integrated frequency synthesis and FSK(frequency shift key) technology,which automatically programs and sets the working frequency via the microprocessor. Flyers can enjoy a glitch free flight without changing crystals.
The signal between the transmitter and receiver use a redundant data stream to ensure accuracy.
The Radio system offers quick response and reduced servo chatter.
2.4Ghz RC System frequency wave range is 1/4 of the usual used frequency wave range. The transmitter antenna is just 14.5cm in length and the receiver antenna is greatly reduced over 72MHz.

The latest ESky Belt-CP X is an upgrade version of the world famous ESky Belt-CP RC helicopter. With totally fresh apperance and new designs for the main rotor and tail rotor systems, the Belt-CP X increases the stability, powerful and accuracy of the helicopter as well as to give more direct control by the pilot.
It has created a newly designed 2.4GHz frequency band,"2.4GHz" RC system with advanced Spread Spectrum Technology and digital FSK(frequency shift key)Coding Technology. This offers many advantages compared to traditional 72 MHz transmitters.

Features:

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Completely assembled and tested at the factory,ready to fly out box!

120 degree ECCPM control system
450 brushless motor, 25A brushless ESC and 3S 11.1V 1800mAh 20C Li-Po battery deliver incredible power and performance.

The new 2.4G remote control system adopts Advanced Spread Spectrum technology and digital FSK (Frequency Shift Key) coding technology.This combined with four digital servos, ensures rapid response, precise control and nimbler movement.

High performance Heading Lock gyro is Capable of sport flying and 3D aerobatics

Stainless steel flybar, main shaft and tail shaft

Specification:
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Main Rotor Diameter: 680mm (27 inch )
Tail Rotor Diameter: 130mm (5 inch)

Length: 650mm (25 inch)
Gyro: Esky Professional Head Lock Gyro (EK2-0704B)
Speed Controller: 25A Brushless ESC (EK1-0350)
Battery: 11.1V 1800mah 20C 3-Cell Li-Polymer (EK1-0186)
Control system: 6-channel 2.4G transmitter and Receiver
Radio Control Range: 2500 feet (762m)
Height: 230mm (9 inch)
Flying Weight: 670g (24 oz)
Main Gear: 10 teeth
Main Driven Gear: 140 teeth
Tail Driven Gear: 110 teeth
Driven Gear Ratio: 14:1:5
Drive System: 3800KV Brushless motor (EK5-0006)
Servo: 4x quick responsive 7.5g micro servos (EK2-0508)

Package Included:
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Helicopter (100% Assembled)
6-channel 2.4G transmitter and Receiver
11.1V 1800mah 20C 3-Cell Li-Polymer Rechargeable Battery
English Manual
100-240V Wall Battery Balance Charger