VvW 2 Wire Dc 2.7-30v Waterproof Car Battery Condition Gauge Auto/motorcycle Volt Meter Green LED +Waterproof Waterproof Dimensions: 4.0CM x 2.5CM x 2.3CM1.57inch x 0.98inch x 0.91inch Measure range: DC 2.7-30.0V Display: three 0.40" LED digital tube Display Color: Green