NEW FROM 123  
EXTERNAL BLUETOOTH SPECIALLY DESIGNED FOR THE VW BUS
How to install a 123ignition distributor:
https://youtu.be/Bea9yXpZ7aw
The 123/TUNE+ 4-R-V-EXT-BLUE is specially designed for the VW bus, where the engine is located at the back, under a metal cover. This creates a kind of Faraday cage; electromagnetic radiation is blocked (both ways). What this means for the TUNE+ is that the Bluetooth connection falters at best, and does not work at worst. The 123/TUNE+ 4-R-V-EXT-BLUE completely eliminates this problem; the external Bluetooth module is mounted outside the engine compartment, to provide an always reliable Bluetooth connection.
The Bluetooth programmable 123/TUNE+-4-R-V-V-EXT-BLUE is specially designed for the VW bus, where the engine is located at the back, under a metal cover.
123ignition is proud to announce the first fully programmable Bluetooth ignition! Control your 123/TUNE+ with your iOS/Android smartphone or tablet. The App makes it possible to adjust the ignition curve and shows an electronic dashboard.
Main features: REV-counter, Antitheft system by a PIN code, Real time tuning, Vacuum advance, Boost retard, Soft REV-limiter, etc.
Tune+-4-R-V-V-EXT-BLUE = Tune+ stands for connection with bluetooth    
Tune+-4-R-V-V-EXT-BLUE = 4 stands for the numbers of cylinders  
Tune+-4-R-V-V-EXT-BLUE = R stands for straight distributor cap  
Tune+-4-R-V-V-EXT-BLUE = V stands for vacuum advance
Tune+-4-R-V-V-EXT-BLUE = V stands for the 123ignition type  
Tune+-4-R-V-V-EXT-BLUE = EXT-BLUE Stands for an external Bluetooth module.