A great helper for checking car battery status, starting and charging, so you can know exactly whether the battery needs to be replaced or simply recharged. This tester universal battery pack fits all 12V charging systems including regular flooded, flat plate AGM, spiral AGM and GEL batteries for vehicles, forklifts, hybrid cars, SUVs, vans, boats, RVs, motorcycles, travel trailers. 6 LED lights intuitively display battery and alternator status, green means good/full, amber means medium, red means low. 2 copper clips more sensitive and accurate, get a result as soon as possible. Reverse protection function prevents burning caused by wrong operation between battery (+) terminal and cable (-) terminal.< /p> Specification: Color: Grey Body Material: ABS Clip Material: Copper Q LED quantity: 6 (2 red, 3 green and 1 yellow) Test method: +/- connection test Measurement range: 4V-12V Item size: 120 x 48 x 18.5 mm Item weight: 58 g Dynamo is able to verify: First light (red): Error Second light (green): Good Third light (green): Full Checking Battery Status: First Light (Yellow): Middle Second Light (Red): Low Third Light (Green): OK