Features:1.Safe power function:regardless of the throttle stick in any position the motor will not start immediately.2.Throttle Calibration function:Adapt to different remote throttle travel difference, improve throttle response linearity, with a smooth, delicate feel and excellent speed linear speed.3.Low Voltage Protection Mode ,Low-voltage protection threshold.30A Brushless speed controller ESC MultiCopter Quad-rotor X-copterSpecifications: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 BLM, 70,000rpm for 6 poles BLM, 35,000rpm for 12 poles BLM.(BLM: BrushLess Motor)With T plug and 3.5mm banana connectorsNote: This ESC is not able to flash the firmware.A2212 1000kv Motor Specification:KV: 1000Max Efficiency: 80%Max Efficiency Current: 4-10A (>75%)Current Capacity: 12A/60sNo Load Current @ 10V: 0.5ANo. Of Cells: 2-3 Li-PolyMotor Dimensions: 27.5 x 30mmShaft Diameter: 3.17mmWeight: 47gA2212 1400kv Motor Specifications:KV: 1400Max Efficiency: 80%Max Efficiency Current: 4-10A (>75%)Current Capacity: 12A/60sNo Load Current @ 10V: 0.5ANo. Of Cells: 2-3 Li-PolyMotor Dimensions: 27.5 x 30mmShaft Diameter: 3.17mmWeight: 47gA2212 2200KV Motor Specifications:KV: 2200Ri(M ): 0.033Battery: 2-3Li-PoMax Power: 342WTest Prop: 7x3/7x4Motor Size: 27.5x38mm/1.08''x1.5''Shaft Diameter: 3.17mm/0.12''Package information:Package Size:25*15*3cmPackage Weight:90gPackage included:1 x A2212 Motor1 x 30A ESCNote: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.