Support for STC89C51/52, STC89C51RC/52RC, STC12C5A60S2, AT89C51, AT89C52, AT89S51, AT89S52 microcontrollers, as well as other 40 pin 51 series microcontrollers and ATmega16! When using AT89S series microcontrollers, a USB ISP downloader is required to download the program. For AT89C series microcontrollers, another programmer is necessary to burn the program onto this development board. For STC series microcontrollers, the program can be downloaded using a serial port cable, USB to serial port cable, or USB to TTL. This kit does not include a microcontroller, power cord, or download cable; these must be purchased separately. Supply voltage: DC5V Shipping crystal oscillator: 11.0592MHz LCD interface: LCD1602, LCD12864 Expansion buttons: 4 Board size: 84 * 74mm. Color: As Shown Material: PCB Package Contents: 1 x RC Brushed ESC Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.