The PowerDomain 39160 adapter can be used in any Macintosh G3 computer with a motherboard at or above revision B. This includes all Blue and White G3 and current G4 models.

In the above screen shot of the Apple System Profiler, notice the Product Information - ROM Revision section. The ROM revision listed there must end with 45F1 or above for the motherboard to be a revision B. A ROM version of 44D7 would indicate a motherboard prior to revision B, and would not be compatible with the PowerDomain 39160.