["brand new and high quality\r\nMaterial: Electrical components\r\nColor: See pictures\r\nDescription\r\nThe boot program has been programmed\r\nThe use of locking for seat, chip replacement easy\r\nYou can use FT232 USB transfer TTL module, CH340G module, CP2102 module burning program\r\n compatible R3 procedures, development environment IDE.\r\nMicrocontrollers: \r\nOperating voltage: 5V\r\nIO port logic voltage: 5V\r\nOperating current: 500mA (max)\r\nDigital I / O Pins: 14 (6 of which provide PWM output)\r\nAnalog input pins: 6\r\nClock frequency: 16MHz\r\nOn-board test indicator, beginners programmable control of the indicator.\r\nOnboard power indicator\r\nBoot program burning interface: ICSP\r\nProgram burn interface: GND, 5V, RX, TX, DTR\r\nSize: 6.7*3.5cm/2.64\"*1.38\"\r\nQuantity:1Pc\r\nNote: Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!"]