This is a replacement DC-in Board with power adapter input that can be used in the Apple iBook G3 12.1 Inch as printed below.

Compatible with:

iBook G3 (Dual USB) 12.1/500MHz
iBook G3 (Late 2001) 12.1/600MHz
iBook G3 (16 VRAM) 12.1/700MHz
iBook G3 (800 MHz 32 VRAM) 12.1/800MHz

Apple Reference: 922-5160 DC-in Board (replaces 922-4592)