Using AM32 open source firmware, you can freely adjust parameters support ds /pwm signals, linear at low speed, violent at high speed, very smooth speed adjustment, and no heat at low temperature. Supports two-way/one-way operation, adjustable drag brake, sinusoidal start and other functions, fast forward and reverse switching is very smooth. AM32-20A Parameters 1: Voltage range 2-3S (7.4-12.6V) 2: Single cell LIPO protection voltage 3.0V 3: Continuous working current 20A 4: Instantaneous current up to 30A 5: BEC output: 5V2A 6: Size 40x18x6 (mm) 7: PCB board size: 35x17MM 8: Weight: about 8.6G Colour:As Shown Material:PCB Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * AM32 20A ESC 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.