Item arrived with no instructions - but it was easy to figure out how to assemble. a HAT with your RPI4b. I'm using an official RPI POE+ hat and the device doesn't leave enough clearance (3mm between the fan on the POE+ hat) - so I added an extra M3x12+6 clearance for better airflow. I think the product is good value and the extra spacing is a slight improvement - I would recommend this even if you don't use a HAT. Check out the pictures I've included.
π MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
11 Review
LAFVIN Super Starter Kit for Arduino R3 Mega2560 Mega328 Nano with Detailed Tutorial - Compatible with Arduino IDE
11 Review
GeeekPi Raspberry Pi Cluster Case with Cooling Fan and Heatsink for Pi 4 Model B, 3 Model B+ & 3/2 Model B
11 Review
55" TV LG OLED55C2RLA 2022 HDR, OLED, dark titanium
38 Review
Glarks 660 Pieces Phillips Assortment Motherboard
10 Review
uxcell 3.5" HDD Screw Black 200pcs for Computer PC Case - Flat Phillips Head - 6#-32 - Hard Drive Fasteners
10 Review
π§ Premium Repair Replacement Screws & Tools for MacBook Pro Retina 15"/13" - Complete Bottom Case Set
10 Review
M.2 Screw Kit: Easy Mounting for NVMe SSDs on ASUS Motherboards
19 Review