The board features bi-directional motor control using a TB6612 dual H-bridge, so it can control one stepper motor or two brushed DC motors with 4.5-13VDC power and about 1A current draw per motor. There’s also two open drain 2A MOSFET outputs for things like solenoids or large LEDs. There’s a socket for a HC-SR04 sonar sensor, and a socket breakout available to use with 5V i2c interface sensors. The board provides 5V regulated power to Photon or Core with a max input voltage of 12V.
There’s an accompanying C library here to help you get your PhoBot up and running and SparkCore or Photon controlling robots!