Motorcycle 3 In 1 Digital Time Clock + Thermometer +Voltage Voltmeter IP67 Waterproof Tester Battery Monitor Gauge for Car Boat Marine - Blue Real-time digital display,waterproof,low pressure,high voltage warning function DC voltage measurement,make your vehicle work at normal voltage,prolong your vehicle's service life LED panel digital display,reading in seconds,more intuitive,quick,and convenient Mini size,easy to carry,won't obstruct riding,guarantee your safe riding Easy to install with necessary fittings,hold the meter in place,fix tightly and not easy to move,great for checking voltage Made of premium quality material,flame retardant,and environment-friendly,safe and durable Specification: Voltage: DC 6V-30V Function: voltmeter+electronic clock+thermometer Display: LED Material: Acrylic Waterproof degree: IP67 Color: Black Power line length: 1.2m LED Color: Red/Blue optional Wiring mode: The red wire is connected to the battery positive pole,the black wire is connected to the battery negative pole,and the blue wire is connected to the main power switch Flicker warning function for low voltage (below 12V) and high voltage (above 16V) Package included: 1 x Voltmeter