The DHC BTW350 is a wireless battery and electrical system tester that conducts tests via Bluetooth connection to the DHC app on a smartphone or tablet, which then displays real-time results. The app-based interface is not limited by cable length, and it allows users to edit and save customer and shop information as well as share test results with customers through text or images. It supports 6V and 12V batteries and includes 12V and 24V system tests. It comes with a 12-month warranty.