The CTEK Sense CTX battery monitor makes it possible to get information on the charging status of all your batteries in real time. The battery monitor helps you keep an eye on your batteries in a simple, user-friendly and transparent way. Imagine what it's like to have a talking battery monitor By simply connecting the monitor to the battery and downloading the app, the monitor will talk to you so you don't even have to lower your head to read the screen The battery monitor tells you when to charge and shows you the charging status in real time. You can even be briefed on your battery health via bluetooth by just walking to your vehicle - you don't even have to start the engine This CTEK product will help you maximise your battery's operating life Knowing your battery's charge level makes it very easy to monitor their health status and thus maximises your battery performance and operating life. This product will also help you avoid costly battery replacements and annoying vehicle breakdowns. The battery sense gives you full control of all your vehicles' batteries and allows you to choose the CTEK charger that suits you and your vehicle when it's time to charge. CTEK has a wide product range that enables you to choose a charger for every vehicle and occasion. With the battery monitor and the appropriate CTEK chargers, you get a complete battery care package. Compatible with Android OS 4.4 (or higher), iPhone iOS 7 (or higher) and Bluetooth 4.0 hardware.