ITEM NAME:Digital Mini Ammeter Ammeter of power indicator LED Red 0-5A panel meter B6E3 Digital Mini Ammeter Ammeter of power indicator LED Red 0-5A panel meter B6E3 Measuring range: 0 - 5A Operating voltage: 4 - 30V LED Color: Red Screen size: 2.3 x 1.5 cm wiring on the left side of the two is the supply voltage, the red wire should be connected to the positive pole and the negative pole to the black. wheat white ca is connected to the lower part of the anode the device tests that black cathode package content:1 x ammeter Note:Light shooting 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 +/- 1-3 cm.