1、Professional manufacturing, reasonable circuit layout and stable operation 2、Quality assurance, durable and long service life 3、Simple assembly and structure, easy to install 4、Complete accessories, convenient to replace the old one 5、High quality of the product can provide stable performance 1 x Controller 4 x Screw 4 x Nut 1 x Power Cord 1 x Switch 1 x Power Supply Gasket 1 x USB Cable  Item Type: Robot Control Board32 KB flash programmable memoryClock Frequency: 20MHzBuilt-in BootLoader: OptibootInstallation: 3 x for ATmega328P processing unitInput Voltage: 12VWorking Voltage: 5V4 x digital sensor ports (D2 can be used as a serial port) and 3 x analog sensor portsI2C Communication Port: 1, 1 x USB programming port, 1 x motor controller expansion port and 2 x quadrature encoder input ports2 x high current DC motor control ports6 x standard control servo ports and 2 x continuous rotation (CR) servo portsBattery connection portProgrammable "start" button (green) and non-programmable "stop / reset" button (red)Programmable Onboard LED: 3pcs, red, yellow, greenMotor Port Output Power: 1000WMaximum Load Current Of Motor Port: 40A