Mini DC Voltmeters Total 8PCS, 4 colors combined(2PCS Red/Yellow/Blue/Green); 0.28 inch LED Panel; small in size and light in weight; wire is made of 28awg gauge; install the hole: 23*10 mm approx
2 Connection Methods 3 wires are connected separately to measure voltage and power(Red yellow is both for pos, black is neg); 3 wires are used as 2 wires, connected to measure voltage(Red and Yellow can be paired for pos, black is neg)
Features Reverse polarity protection, voltmeter won't burn out if reverse polarity is applied; high precision; low starting working voltage; fine adjustment function
Note Max voltage with yellow and red connected is 40V.To measure greater than 40V (up to 100V) the yellow wire is connected to a separate voltage source that is 40V or less
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