CCTV Camera SMPS & DVR DC power supply DIY tester tool

Best useful DIY tool for CCTV Technician & Installers to test the CCTV Camera Smps power supply and dvr power adapter

Bi Color LED : https://amzn.to/3LHXbQd 

1K Resistor : https://amzn.to/3JFjJzm 

IN4077 Diode : https://amzn.to/3rXnyK5