The KNDNA Tracker
, may look like a calculator, but can be used to locate any person who has ever been a KND operative with any trace of DNA. It was created by Numbuh 101
and kept in the Kids Next Door Seriously Cool Museum of Artifacts and Stuff
In Operation: Z.E.R.O., Numbuh 101 gave it to Numbuh 1 to help him locate Numbuh 0 for help after Grandfather took over the world.