As Jonas and Ryan said, the switch is wired incorrectly. Connected this way, it will not protect your meter when it is first connected. It does not protect against the initial surge of power consumed by the car computer and other accessories. I'm going to wire my switch like they do. Otherwise it appears to be well built.
Enhance Vehicle Diagnostics with FIXD OBD2 Professional Bluetooth Scan Tool & Code Reader - iPhone and Android Compatible
6 Review
π΅ BlueDriver Bluetooth Pro for iPhone and Android
4 Review
π Autel MS309 OBD2 Scanner: Check Engine Fault Code Reader with Freeze Frame Data, Clear Codes, I/M Readiness, CAN Diagnostic Scan Tool
7 Review
π Enhanced Diagnostic Professional FOXWELL NT301
7 Review
Rechargeable screwdriver OA-3,6F (433.0.2.00), 3.6 V, 1.3 Ah Li-ion, blister
46 Review
Tool set Ombra OMT82S12, 82 pcs, brown
22 Review
Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review
Xiaomi Mi x Mijia Wiha Precision Screwdriver Set (DZN4000CN), 25 pcs
34 Review