The analyzers connect via Bluetooth® to an app installed on the user’s
smartphone where measurements can be displayed and recorded. Two of the
instruments, the C6 and C8, can also be used in a standalone mode where
a smartphone app is not required. When used in standalone mode, results
display on a small screen built into the device. The Pro model requires the use of the companion smartphone app.
The dimensions of the instruments are: 6.98 x
4.44 x 1.60, 6.35 x 5.58 x 1.67, and 5.61 x 4.76 x 1.67 cm, for the Pro,
C8 and C6 respectively \cite{pro,c8,keychain}. Figure \ref{324790} shows a picture of the BACtrack® Pro, C8, and C6 from left to right with a AAA size battery included on the far left for scale.