Twinb mb compact4 and bmw gt1 pro diagnostic tool TwinB is a 2-in-1 machine of BMW GT1 and MB Star Compact4. It has all functions of BMW GT1 and MB Star 2000, with DAS, DIS and SSS only one hard disk. This makes TwinB do a good job when you need to diagnose both BMW and Benz frequently! Also Twin B is samller, so it is easy to be carried for your on-the-spot diagnosis. TwinB Star C4: 1. TwinB Star C4 can be available for any kind of computer. 2. TwinB Star C4 has rs232/485 interface, which can connect with touch screen and also common screen. 3. TwinB Star C4 can work in the voltage of 12V/24V. 4. TwinB Star C4 can supply power to the computer by Power Cable. TwinB GT1 Pro: 1.Self-protection: GT1 Pro Multiplexer will be turned off by itself if the voltage surpasses 15.8V during your testing, and it will restart if the voltage below 15.8V autometically. 2. TwinB GT1 Pro uses the newest hardware DK219. 3. TwinB GT1 Pro can also supply power to the computer by the power cable interface in the LAN cable.