Feature: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 Liion batteries and nickelcadmium batteries, and the time can be changed to suit different brushless motors.4. Comprehensive protection, low pressure cutoff 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.Specification:Item Type: Helicopter Fixed Wing SetMaterial: Metal+PlasticColor: As Picture ShownWeight: Approx. 143.0g/5.0ozSG90 9G Servo :Length: Approx. 21.5mm/0.8inWidth: Approx. 11.8mm/0.5inHeight: Approx. 22.7mm/0.9inWeight: 9g/0.3ozNo-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 CelsiusDead Zone Setting: 5 MicrosecondsWorking Voltage: 4.8V-6V2212 Motor:Length: Approx. 30mm/1.2inWidth: Approx. 27.5mm/1.1inShaft Diameter: Approx. 3.17mm/0.1inkv: 1400kv30A ESC:Plug: XT60Continuous Current: 30AMaximum 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 35,000rpmApplication: RC Helicopter.Package List:1 x Motor2 x Propeller2 x Servo1 x ESC1 x Motor Base1 x Motor Head6 x Servo Arm1 x Strap10 x Screw2 Row x Propeller Gasket