The CJ4R Diagnostic System by Injectronic USA is a professional-level OBD-II scan tool with a built-in two-channel lab scope developed with the professional technician in mind. It offers enhanced OBD-II capabilities such as bidirectional controls; enhanced DTCs; fast, live data; and much more. Diagnostic coverage includes domestic, Asian and European vehicles. The CJ4-R offers the technician freedom by connecting to external displays, such as a smartphone or tablet, via Bluetooth for easy mobility. The built-in two-channel lab scope allows easy access for fast waveform diagnostics. The unit includes a free Android and Apple OS app that turns the CJ4-R lab scope into a fast, wireless voltmeter using any compatible mobile device. Add-ons have been developed to future proof the tool, such as a Battery/Charging System Tester, and Fuel Injector Tester.