Ultimate 4s is robot line tracer with 14 Sensor and Atmega 1284p chip. This robot using micro usb socket for communication that support with arduino ide software. For actuator this robot use flying motor DC geared and rotary encoder sensor. It is controlled with compact H-bridge mosfet on the top of robot. Main display in this robot use oled LC 0.96″ and have 6 button navigation. Main voltage regulator use Buck Converter DC to DC LM2596 5v. Ultimate 4s is already using CHIOS 5 operating system.