Sensor-based for excellent torque and low-speed driveability Compatible with any sensored/sensorless ESC High RPM precision bearings CNC machined billet T6 aluminum heatsink can High purity copper windings maximizes conductivity Material:Aluminum alloy Color:blue High power solder tabs Removable/Replaceable rotor Powerful sintered neodymium magnet Precision engineered for maximum energy conversion Item name: Sensored brushless motor Size: 540 Battery: 1-3S LiPo battery Sensored: Yes Max current: 34A Resistance: 0.0514 Watts: 130 Turns: 17.5 KV: 2200KV Shaft diameter: 3.17mm Weight: 170g Package Contents: 1 * 540 17.5T 2200KV Motor 1 * Connecting Cable Only the above package content, other products are not included. Note: Light 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.