Why is my UltraBlock or or FireFly yellow?

The UltraBlock and FireFly IDE bridges, like all UltraBlock forensic bridges, can be configured for read-only or read-write operation. Some customers require the UltraBlock and FireFly units pre-configured for read-write operation. To make these units stand out, so they aren't accidentally confused with write-blocking UltraBlock forensic bridges, these units are encased in yellow cases instead of the standard black cases.