QUICKLYNKS BT2000 Bluetooth 12V Battery Monitor Voltage Tester Meter Car Vehicle

QUICKLYNKS BT2000 is used to monitor and test 12V car battery, starting system, charging system. Once it's attached to the battery, the phone can connect it via Bluetooth 4.0. It can send notification alerts to users when there is a problem with battery testing, startup and charging systems.

eBay