Features: The 0.28" LED display makes it easy to read. The ultralowpower consumption makes it energy efficient. With a wide rangeof power supply voltage of DC4.5-30V, this product is suitable for use in variousplaces. This dualuse voltmeter and ammeter is perfect for electricians, electric vehicle users, car users, motorcycles users, etc. This table is equipped with five wires for easyaccessto the car, battery car, motorcycles insidetheline, for monitoring the battery voltage, timely grasp the battery voltagestatus, can also be used for other product voltage, current measurement purposes. Specifications: Material: Plastic Supply voltage: DC4.5-30V Test voltage: 0~100V; Minimum resolution: 0.1V Test currentrange: maximum10A, minimum resolution: 10MA (built-in divider) Operating current: Less Equal to 20MA (ultralowpower consumption) Display mode: 0.28" LED Dimensions: 48x29x21MM Installation hole: 45.5x26.5MM Measurement rate: 200ms/ time Measurement accuracy: 1%1Digit Color: Red/Blue Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Voltmeter Ammeter