LED Screw Terminal Hat for Raspberry Pi is a GPIO expansion board which is for easy connecting to the 40-Pins GPIO of Raspberry Pi and it can be observing the Pin status via LED indicators, once the GPIO has level changed, the led indicator will be blinking.
features: Compatibility: Raspberry Pi 40Pin GPIO (Raspberry Pi 4B/3B/3B+/zero/zero w/zero 2w) Easy to assemble Screw terminal GPIO LED indicator Stable connection for wiring circuit GPIO function mark sticky GPIO status LED and power 5V / 3.3V indication. GPIO output level high LED on, output level low LED off. 5V Red , 3.3V Red, GPIOs Light blue.