... RED Digital Voltmeter, 12V DC Battery Monitor Panel Meter Power 6-15V DC 0-20V VOLTAGE DIGITAL PANEL METER ( ... RED LED DISPLAY) Specifications Power Supply Voltage5V~15V DC (With Built-In Voltage Regulator) ... Uses in autos, marine, aircrafts, test instruments, solar, wind, hydro power system etc for current indications and monitoring electrical systemsFeaturesl High ...