With the intAct Battery-Guard and the free Apple or Android app, you can now quickly and easily check the charge level of your battery. Only with a consistent, positive charge state of the battery is full capacity and usability guaranteed. The positive charge state also prevents potential early damage or failure of the battery. After simply connecting it to the battery using ring terminals and downloading the app, the current voltage value can be retrieved. The transmitter is compatible with 6 V, 12 V, and 24 V batteries. The range is approximately 6 meters. The four-color, tachometer-like display shows the charge level in dark green (fully charged), light green (partially charged), orange (discharged), and red (deeply discharged). Additionally, the voltage value is displayed alphanumerically. If the minimum voltage is not met, a reminder to recharge the battery soon will be issued. The app can monitor the voltage of up to 5 batteries, provided that an intAct Battery-Guard is installed on each battery.