1、The SG90 9G micro servo weighs only 9g/0.3oz and has a torque of 1.5 kg/cm. 2、30A ESC has safety arming function, throttle calibration function, and supports multiple program methods. 3、Compatible with Li‑ion batteries and nickel‑cadmium batteries, and the time can be changed to suit different brushless motors. 4、Comprehensive protection, low pressure cut‑off protection, overheat protection, throttle signal loss protection. 5、Compatible for remote control helicopter, made of high quality metal and plastic, easy to install, performs well. Item Type: Helicopter Fixed Wing Set Material: Metal+Plastic Color: As Picture Shown Weight: Approx. 143.0g/5.0oz SG90 9G Servo : Length: Approx. 21.5mm/0.8in Width: Approx. 11.8mm/0.5in Height: Approx. 22.7mm/0.9in Weight: 9g/0.3oz No-Load Speed: 0.12 seconds / 60 degrees (4.8 V) Locked-Rotor Torque: 1.5-1.7kg/cm (4.8V-6V) Working Temperature: -30 to + 60 degrees Celsius Dead Zone Setting: 5 Microseconds 2212 Motor: Length: Approx. 30mm/1.2in Width: Approx. 27.5mm/1.1in Shaft Diameter: Approx. 3.17mm/0.1in kv: 1400kv 30A ESC: Continuous Current: 30A Maximum Current: 40A (10S) Power Input: 2-3Pcs Li-ion Batteries or 5-9Pcs Nickel-Cadmium Batteries (not Included) BEC Output: 2A / 5V (Linear Regulator Mode-Linear Mode) Maximum Speed: 2 Pole BLM is 210,000rpm, 6 Pole BLM is 70,000rpm, 12 Pole BLM is 35,000rpm Application: RC Helicopter 1 x Motor 2 x Propeller 2 x Servo 1 x ESC 1 x Motor Base 1 x Motor Head 6 x Servo Arm 1 x Strap 10 x Screw 2 Row x Propeller Gasket