Major technical specifications: Helicopter: 1. Diameter of main rotary wing: 510mm 2. Length of the airframe: 470mm 3. Maximum flying weight: 350g 4. Main motor: Type-280 5. Tail motor: Type-015 Transmitter: 1. Number of channels: 4 Channel 2. HF modulation mode: Frequency modulation (FM) 3. Encoding mode: Pulse code modulation (PCM) 4. Working voltage: 9.6-12V (8 type-5 rechargeable batteries, or common alkaline batteries) 5. Working currency: about 180 mA 6. Antenna length: 960 mm 7. Working frequency: 35/40/72Mhz 8. Additional function: Interface for computer simulator 9. Mode 1 & Mode 2 available Receiving part: Receiving part distribution: Multifunctional integrated receiving board (receiving, decoding, mixing, and gyroscope) + 2 mini-servo (12g) Feature: Simple in structure, easy for wiring, reliable, with no adjustable components. This distribution meets beginner's choice better. Major technical specifications: External dimension of integrated receiving board: 40 x 30 x 8.5 mm Weight: 12.6g Modulation mode: FM Intermediate frequency: 455k Antenna length: 800mm Working voltage: 8.4V (7 style-7 nickel hydrogen batteries) Working currency: Static 20 mA Dynamic ?5 A (including working currency for major motor and tail motor)