The photos show that you can do this before self-powering and measure up to 80V. The blocks that were sent to me do not have this. It still seems to work between 0 and 30 volts, but that doesn't give me the ability to measure up to 80 volts. In other words what was sent to me was not shown in the picture.
Universal 52Mm Single Hole A-Pillar Gauge Meter Mount Pod Holder With Black Cover For Car Auto By HOTSYSTEM
10 Review
Room temperature and humidity sensor Xiaomi ClearGrass Bluetooth Thermometer white
13 Review
HOTSYSTEM Universal 2Inches 52Mm Single Hole Dash Dashboard Gauge Meter Mount Pod Holder Black Cover For Car Exhaust Gas Oil Water Temperature Temp Voltage Air/Fuel Ratio Turbo Boost Gauge
14 Review
A/C Dash Button Repair Kit: 5PCS TIHOOD Stickers For Faded Auto Climate Control Decals Replacement With Perfect Adhesive Fit
10 Review
3-Compartment Cargo Trunk Storage Organizer By EPAuto: Maximize Your Car'S Storage Space
28 Review
Simplify Your Car Organization With Sposuit'S Collapsible Trunk Organizer - 11 Pockets & Reinforced Handles For Easy Grocery And Cargo Storage! (Grey)
27 Review
Transponder "T-Pass" TRP-4010 AVTODOR TOLL ROADS, black
46 Review
2Buyshop 2 Pack Car Tissue Holder - PU Leather Napkin Box For Sun Visor & Backseat - Black
28 Review