Open source BLHELI-S firmware, supports DSHOT600 protocol, supports high-speed motors. Use high-thickness circuit copper foil to improve heat dissipation performance. Designed for mini multi-rotor crossing machines, the accelerator response is fast. The accelerator signal uses twisted wire cables to reduce the more stable signal transmission in string disturbance and flight. This model is small in size, light weight, stable performance, reliable quality, super cost-effective. Type:30A ESC Initial tension:2-6s lipo Continue current:30A, burst current: 35A up to 10S NO BEC The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:Plastic Package Contents: 4 * 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.