1、This mini electronic speed controller is special designed for UAVs, which can help to adjust the speed of the drone motor 2、Made of high quality material, which is lightweight and also eco-friendly 3、Designed with multiple protection, overcurrent protection, low voltage cut-off protection, Motor short-circuit protection 4、With PWM driving motor which provide more smooth flying 5、Supporting 2S-4S, the continuous current is 20A, the maximum current is 30A Features: 1. This mini electronic speed controller is special designed for UAVs, which can help to adjust the speed of the drone motor. 2. Made of high quality material, which is lightweight and also eco-friendly. 3. Designed with multiple protection,  overcurrent protection, low voltage cut-off protection, Motor short-circuit protection. 4. With PWM driving motor which provide more smooth flying. 5. Originate from BLHeli-S firmware, integrated Dshot150, Dshot300, Dshot600. 6. Supporting for oneshotl25, oneshotl42, multishot. 7. Supporting 2S-4S, the continuous current is 20A, the maximum current is 30A. 8. 4 layer PCB, with good heat emission. Specifications: Condition: 100% Brand New Item Type: RC Accessory Color: As Pictures Show Input: 2-4S LIPO Battery Working Current: 20A Size: Approx. 23.5 * 11.1 * 5mm / 0.9 * 0.4 * 0.2inch Package Weight: Approx. 12g Package Include: 1 x  Electronic Speed Controller