1、Small size is suitable for small drones or quadcopters 2、Exposed power lines and motor line bonding pad, without disassembly to achieve rapid welding 3、Adopting EFM8BB21F16G MCU Chip, supporting 2-3S battery and oneshot, Dshot, multishot signal 4、Supporting PPM, SBUS and other remote control or reception mode 5、Integrated 5V/1A output, convenient to supply power for transmitter, camera, buzzer, led light and other peripherals Features: 1. Small size is suitable for small drones or quadcopters. 2. Exposed power lines and motor line bonding pad, without disassembly to achieve rapid welding. 3. More convenient and easy to replace the motor. 4. F3 flight controller + BLHeli's four-in-one speed controller 2-3S 12A (peak 15A). 5. Suitable for 80-130 wheel base racing quadcopters. 6. Lightweight and small size, easy to install. BLHeli-S Speed Controller: Adopting EFM8BB21F16G MCU Chip. Supporting 2-3S battery. Supporting oneshot, Dshot, multishot signal. 3in1 drive IC, supporting 500, 000 rotation speed. F3 Flight Controller: Supporting PPM, SBUS and other remote control or reception mode. Integrated 5V/1A output, convenient to supply power for transmitter, camera, buzzer, led light and other peripherals. Specifications: Color: As Pictures Size: 20 * 20mm / 0.8 * 0.8inch Package Weight: Approx. 80g Options: Without OSD, With OSD ESC: 12A, 2-3S, 4in1 FC: F3, 5V/1A Type: RC Accessory Package Include: 1 x Set of Electronic Speed Controller + Flight Controller Board with Cables