The item is a professional and practical 2-wires mini panel digital voltage meters voltmeters, which adopts red 3-digit digital display, and can measure voltage from . to 3 . It features low power consumption, and design for easy installation. Features - Color: Black. - Size: 4.00X1.00X1.30cm/1.57X0.39X0.51 inch. - Material: Plastic. - With two wiring, easy access to car /battery car / motorcycle- , with reverse polarity protection, line reversal will not - For monitoring thebattery voltage, battery voltage state to grasp, it can also be used for other products voltage measurementpurposes. - Reverse polarity protection design prevents the voltmeter from burning out when wires are accessed reversely. - Suitable for all kinds of output voltage measurements, such as batteries on mowers, motorcycle, E-bike and scooter. - Adopted from material, it is durable and use. Specification - Detection voltage: . 3 . - Working : <30mA. - Display: 0.28 inch . - Measuring rate: >=200 mS / times. - Measurement accuracy: 3%. - The maximum working voltage: 30 V. - Minimum working voltage: 3.5V. - Operating : -10-65 degree centigrade. Package list: 3 x Voltmeters