RPi Power Relay Board Expansion Module for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B
RPi Power Relay Board Expansion Module with Dual Cooling Fans and Automatic Discoloration LED for Raspberry Pi A+ 3A+ B+ 2B 3B 3B+ 4B. 2 x 20 pins expansion pin header, height 10mm/0.39". 1x Expansion board module with Fan and LED.