OBD2 Scanner VDIAGTOOL VD31, Check Engine Code Reader, 3-in-1 OBD2 Scanner Diagnostic Tool with Car Battery Tester & Car Key Battery Tester, Enhanced Car Code Reader for Cars and Trucks All Cars 1996+

【EFFORTLESS CAR KEY BATTERY CHECK】Never face a dead key remote surprise again! This innovative vehicle code reader features a dedicated key fob battery test function for the new key and the store key. With the included 9V battery for standalone operation, you can check any key’s battery life anywhere & anytime with one hot key. Simply input the frequency or select your car model from the menu for an instant & precise voltage reading. *Pro Tip: For a precise reading, enter the key’s exact frequency, typically found on the key itself or via a quick web search. Contacting a dealer is also an option.Remove the 9V battery when not testing key to preserve its charge. 【UPGRADE OBD2 SCANNER】VDIAGTOOL VD31 is the ultimate upgrade, masterfully blending the full capabilities of a car code reader with a pioneering car key battery voltage tester. It performs all 10 essential OBD2 tests, supporting turn off the Check Engine Light(CEL), read/clear fault codes, monitor live data with 4-in-1 graphing, view freeze frame(10000+ DTC), one-click I/M readiness(smog check),on-board monitor test(Mode 06), component test, O2 sensor test, vehicle info, and module present. Enhanced functionalities such as car battery & Key Fob battery voltage testing, DTC lookup, data playback, and printing make it your all-in-one solution for quick proactive car care without a dealership.