1. The type of battery: Lithium battery / NI-MH battery 2. Battery low voltage protection mode: limit the throttle to only 40% when the voltage reaches low voltage protection. 3. Advance angle: divided into low, medium and high. In general, the low advance Angle can accommodate more motors. However, as the motor structure is quite different, please try each advance Angle to get a satisfactory driving effect. 4.In order to improve the speed, the advance Angle can be set as the high advance Angle. After changing the approach Angle, it is recommended to test on the ground before flying. 1. ensuring that the ESC is of the highest quality and high reliability. 2. It can withstand a higher current. 3. It can set the throttle stroke, compatible with a variety of remote control .With smooth and delicate feel of speed control,first-class linear speed regulation. 4. The maximum speed can be reached 210,000 RPM (2-pole motor), 70,000 RPM (6-pole motor) and 35,000 RPM (12-pole motor). Note: This manual is not suitable for E-power 5A (1S/2S) Type: 5A/1S / 5A/2S / 10A / 20A / 30A / 40A Material:Composite material colour:black<br><br>Package Contents: 1 x ESC Motor Speed Controller<br><br>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.