AirTurn DIGIT II - Manual (Page 3)

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Since the DIGIT II uses SSP (Secure, Simple Pairing), then
the typical 4-digit pairing code is not required. In the
event a PC or MAC is configured to use an older
Bluetooth stack such as version 2.0, then the pairing
code is 1234.
Once paired, the DIGIT II will automatically connect back
to the host device on power up or when a link is lost. Up
to 8 pairings can be stored by the DIGIT II and the most
recent pairing is the host that DIGIT II will try to connect
back to.
iOS Device Pairing
To pair the DIGIT II with an iOS Device such as the iPad,
iPod or iPhone, tap the following sequence: