1. 30A Brushless Speed Controller Esc Multicopter KK Quadcopter X-Copter2. Compatible With: 400-450 Helicopters/Aircrafts Or -Rotor Multi-Rc Helicopters3. 30A Cannot Be Programmed Because It Has Been Programmed During Production.4. 30A Yellow Brushless ESC5. Applicable To F450, F550, Etc. Fixed Wing Four Or Six AxesOutput: 30A Continuously, 40A Burst, Lasting 10 Seconds.Input Voltage: 23-Cell Lithium Battery Or 59-Cell Nicd/Nimh Battery.Bec: 1A/ 5V (Linear Mode).Maximum Rotation Speed: 210,000 RPM For 2-Rod , 70,000 RPM For 6-Rod , 35,000 RPM For 12-Rod .: Brushless MotorNote:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The UseColour:yellowMaterial:plasticSize:about 45 x 24 x 11mmPackage Contents:1 x Brushless ESCOnly 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.