30A Brushless speed controller ESC MultiCopter Quad-rotor X-copter Compatible with: 400-450 helicopters / Aircraft or Quad-Rotor Multi RC Helicopter. Output: Continuous 30A, Burst 40A up to 10 Secs. Input Voltage: 2-3cells lithium battery or 5-9 cells NiCd/NIMh battery. BEC: 2A / 5V (Linear mode). Max Speed: 210,000rpm for 2 Poles , 70,000rpm for 6 poles , 35,000rpm for 12 poles . (: BrushLess Motor) With XT60 Plug and 3.5mm banana connectors SG90A 9G Mini Servo: This is the most popular mini servo. Only weighs 9 and gives you a 1.5 kg/cm torque. Pretty strong regarding its size. Suitable for beam type robots. Key features: Translucent body Less noise SG90A 9G servo parameters: Size: 21.5mmX11.8mmX22.7mm No load speed: 0.12 sec / 60 (4.8 V) Locked-rotor torque: 1.5-1.7kg/cm (4.8V-6V) Operating temperature: -30~~+60 degrees Celsius Dead zone setting: 5 microseconds Working voltage: 4.8V-6V 1400kv Motor Specification: KV: 1400 Max Efficiency: 80% Max Efficiency Current: 4-10A ( 75%) Current Capacity: 12A/60s No Load Current @ 10V: 0.5A No. Of Cells: 2-3 Li-Poly Motor Dimensions: Φ27.5 x 30mm Shaft Diameter: Φ3.17mm size:about 5x3.6x1.5cm Material:Plastic + Metal colour:Multicolor Package Contents: 3 x Motor 3 x ESC 6 x Servo 6 x paddle 3 x Magic Belt Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.