This is a high-quality, easy to use 40 pin ZIF socket that is 0.6" wide with gold-plated contacts. Compatible with 0.3" up to 0.6" wide ICs up to 40-pins. Makes for easy connecting or programming to many DIP ICs. High conductivity terminals create solid connections. Armature makes it easy to open and close socket.
It's a small USB to TTL serial tool, using the PL2303 chip.
You can use it to connect some serial device to your PC via USB port, an avr, an msp430 or an stm32 for example.
It's very cheap compared to the ft232 alternative and works very well, up to more than 1mbit/s.