This 8051 Development Board has DIP 40 Pin Microcontroller ZIF(Zero Insertion Force) Socket. For Easy Insert & Remove of IC. ZIF Socket Protect Your Microcontroller From Damage|8051 Board With USB Programmer Kit Support Window,Mac OS X,Linux|Easy Prototype with 8051 Microcontroller,High Quality FR4 PCB 8051 Kit Support 8051,8052 40-Pin ICIOn-board RS232 for Easy Communication with PC & other Serial device GPS,GSM Modem | Extension Slot on Every Microcontroller Port Pin with Detail Labeling GND&Vcc Bus(5V and 12V DC) to Supply Power External Device|Output LED (P2.0 Pin)|Input Switch P3.3|External Interrupt Switch (INT 1)|Four Mounting Holes 3.0 mm for Easy Mounting | 6 Pin Polarized ISP Interface Connector USB ISP Programmer support both 8051 & AVR IC (2in1)|5V USB Supply Option for Target so No Need Any External Supply|Read/Write Microcontroller Flash,EEPROM,Fuse,Lock Bit| 5KB/s Max Write Speed|SCK Option Support Targets with Low Clock Speed(<1.5 MHz) Please Contact Seller,For Driver Download Link(Window OS 64/32-bit)| How To Install Driver & Program 8051 AVR IC |Circuit Diagram-Connection