Easy to read Come with screws for simple DIY installation Range: DC 0 - 20A Power: tested taken from the device Color: white They are on a 20A analog ampere panel meter current ammeter offer, ideal for your systems to have a quick and accurate monitor. Dimensions: 55 x 63 x 55 mm or 2.16 x 2.48 x 2.16 inch Note: Please note that we have 2 different kinds in stock, and the colors of the screws are different; (Please note the pictures) And the color will be sent at random. Screws for easy installation. Note: This product needs to connect with shunt resistance. It comes without the shunt resistor. Package content: 3 x DC ammeter 0-20A Note: Random color, don't accept the specified color. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.