I suggest na instead of voltmeter yung elm327 na obd2 scanner na lang. for less than 500 sa lazada ma xenderdiscordomegles madaming has info na nakukuha. May ganon ako dati sa jazz kaso binigay ko kay mel casaba.
I suggest you get The 3-in-1 variety (voltmeter, thermometer, & usb charger). It's pretty handy to have in your cabin