Item Type: Battery Level Indicator Module PCB Size: Approx. 22.2 x 17.2mm / 0.87 x 0.68in 1Battery Tester: The battery capacity indicator module can read the approximate battery level in the current situation. 2Great Accuracy: Comes with high accuracy voltage detection chip and power regulator chip as well, useful and reliable. 3LED Indicators: There are 4pcs LED in different colours, and the clear display will better show the battery capacity. 44 Phase Design: 4 phase design in red, yellow, yellow and green respectively represent 20%, 50%, 80%, and 100% power. 5Easy to Install: Reserved 1pc battery detection interface and 2pcs positioning hole will facilitate the installation.2 x Battery Level Indicator Module