Integrated 2 pieces of L298N chips, can drive four DC motors (can control turning direction, can use PWM for speed regulation) or two stepper motors.
Integrated LM2596 DC-DC voltage stabilizing chip ( output 5V, can supply power for MCU, servo, sensor, router, battery up to 2A).
In addition to the above mentioned 2 L298N chip, integrated another ULN2003 to drive another stepper motor, or 4 DC motor (power on and off, can't control turning direction). For example, in extinguishing fire robot, it can control the extinguishing fan, no need for plus circuit.
Integrated servo interface, lead out signal output, very convenient to connect to MCU.
Integrated USB port, can be directly plugged into the router to supply power.
Support W703N, WiFi car router modification without damage, insert USB, use pin to lead out RXD TXD, very convenient to communicate with its UCM.