A Bluetooth enabled smart battery management tool. Assist in preventing vehicle breakdowns and maximize the performance of your battery. Easy to understand information about your batterys charge. Free app available for download. Sync multiple monitors to your phone for a complete battery management system. Suitable for all car, motorcycle, and starter batteries 4.5AH or over. Compatible with Android OS 4.4 and higher, iPhone iOS 7 and higher, Bluetooth 4.0. Push notification is sent if your charge falls to a critical level. 2 -year warranty.