BenchTech BT-YB27VA DC Panel 0-100V Volt Ampere/Amp Meter 2in1 Red/Blue 2-color Display LED Voltmeter Car 12V 24V Built-in Shunt (Red-Red 100A) Operating voltage:DC 4.5 ~ 30V; Measure voltage: DC 0 ~ 100V Measure current: &lt;10A (measure directly,built-in shunt); &gt;10A need buy current shunt Display: three 0.28" LED digital tube; Display color: Red and Blue or Red and Red (2-color display) Dimension: 48X29X21mm BenchTech Authorised in Amazon: US BUY