The new JB4 PRO free app and Bluetooth adapter are the perfect connection companion for your JB4!

It starts with our newly designed Bluetooth adapter featuring a relatively simple, low-cost, high-power, and reliable BLE chipset. The new adapter is compact enough to fit fully inside your JB4 enclosure and powerful enough to ensure a consistent connection inside the car.

The all-new JB4PRO free app, which runs exclusively on our new adapter was designed from the ground up in-house for ease of use, simplicity, and reliability. Able to operate fully offline, it includes all the features you've come to expect from a JB4 app, including map switching, live data monitoring, auto logging, read/delete fault codes, firmware updates, setting changes, and more. We've also added useful help functions to describe what the settings do, performance metrics and analysis tools so you can evaluate your car's performance, GPS elevation/speed as a logging channel, and often requested functions such as "restore default settings".