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