This product integrates many functions such as buzzer, digital tube, LED, EEPROM, liquid crystal, temperature, infrared, buttons and so on The development board supports XP, WIN7 64-bit system With the provided USB extension cable, it is easy to realize the first- program download No additional downloader required. The development board can communicate with the computer through serial port through usb, can memorize the number of the development board is turned , with 4-segment digital tube display, support 1602 and 12864 LCD, with infrared receiver and temperature sensor circuit51 MCU learning is easy to get started, the enlightenment development board for you to learn [1]. Compatible with AT, STC series MCU at the same time[2]. All the 32 IO pins of the single-chip microcomputer are led out[3]. With USB downloader function, it is convenient to download the program (no need to purchase additional downloader)[4]. LED circuit with indication[5]. High-quality plate production, mass production through full machine processing, quality assurance[6].8 SMD LEDs to indicate program running status[7]. The pin header leads to 3 channels of VCC and GND, which can be input or output supply[8]. With 4 buttons to realize man-machine input (control the development board)[9]. Standard ISP download interface, easy to use AT series microcontroller[10]. Temperature sensor circuit (if necessary, you can take the temperature sensor of our shop independently)[11]. Infrared receiving circuit (if necessary, you can take the infrared receiving head of our shop independently)[12]. Integrated buzzer circuit, can do sound experimentColour:black+redMaterial:abs+metalPackage Contents:1 x Small system board (without LCD screen, without ds18b20, vs1838)1 x STC89C52RC microcontroller4 x Yellow jumper cap1 x USB male to male data cable4 x Development board isolation column1 x Development board supporting information CDOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.