A self-powered 7 segment LED voltmeter for use between 4.5V and 30V making it perfect for any 12V or 24V system.
These low-cost voltmeteres are very easy to install by simply cutting an appropriate sized opening, and connecting the wires to the voltage source you want to measure. Spring clips keep the voltmetre in place when mounted.
 
500ms refresh rate
 
Multiple colour options available:
Red:  P2300
Green:  P2303
Blue:  P2304