1. The SG90 9G micro servo weighs only 9g and has a torsion of 1.5?1.7kg/cm (4.8V?6V).
2. 40A ESC with security arming function, throttle calibration function, support multiple program methods.
3. Compatible with lithium batteries(not included). The time can be changed to suit different brushless motors.
4. Comprehensive , features low pressure cut?off /overheat /throttle signal loss .
5. This kit includes 2217 KV1250 motor+8060 propeller+steering engine+40A XT60 ESC, can provides your RC helicopter better performance.

Specification:
Item Type: 2217 Motor Kit
Material: Metal+Plastic
SG90 9g Servo Parameters:
Size: Approx. 21.5 x 11.8 x 22.7mm/0.85 x 0.46 x 0.89in
Weight: Approx. 9g/0.32oz
No-Load Speed: 0.12s/ 60 Degrees (4.8 V)
Locked-Rotor Torsion: 1.5-1.7kg/cm (4.8V-6V)
Working Temperature: -30-+ 60?
Dead Zone Setting: 5 Microseconds
Working Voltage: 4.8V-6V
2217 Motor Specifications:
Size: Approx. 27.8 x 32mm/1.1 x 1.3in
Shaft Diameter: Approx. 4 mm/0.16in
Kv: 1250kv
40A ESC Specifications:
Plug: XT60
Continuous Current: 40A
Peaking Current: 55A (10S)
Power Input: 2-4 Lithium Batteries (Not Included)
BEC Output: 5V at 3A (Linear Regulator Mode-Linear Mode)
Maximum Speed: 210,000 Rpm for 2-Pole Motor, 7000 Rpm for 6-Pole Motor, 35,000 Rpm for 12-Pole Motor
Application: Suitable for RC remote control helicopter

Package List:
1 x Motor
2 x Propeller
2 x Steering Engine
1 x ESC(Not Included Battery)
1 x Motor Base
1 x Coniform Head
6 x Servo Arm
1 x Tie
10 x Screw
2 x Rows of Propeller Washer