LTEMG 3 in 1 Digital Time Clock + Thermometer + Voltage Voltmeter - DC 6V-30V IP67 Waterproof

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/Green optional Package Size: 11 * 10 * 10cm / 4.33 * 3.94 * 3.94in Package Weight: 55g/1.94oz Packing List: 1 * Voltmeter Wiring mode: The red and black lines are the postive pole and the green line is the negative pole.