Bought for a ham radio project to check battery and line voltage. Shows "13.8" when I start the PSU, exactly what it says on the voltage output. Displays "12.4" when connected to fully charged batteries. Both voltages are checked by the DVOM. Supplied with 2 flat quick disconnect crimp connectors for small wires. Can be used with or without an overlay, I didn't need it. A 1 inch diameter hole is required for electricians. it would probably be perfect. I used a step drill and had to file it down a bit.
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