Standard RPi Pico header, fits Raspberry Pi Pico series; I2C controlled, supports 32x different I2C addresses by setting the 5 address jumpers; Onboard PCA9685 chip, provides 12-bit hardware PWM to adjust motor speed; Onboard TB6612FNG dual H-bridge motor driver, high efficiency, low heating; Integrates 5V regulator, up to 3A output current, can be powered from battery through VIN terminal; Breakout unused pins of Pico for easy extension