By Timothy S. Brannan and The Netbook of Witches and Warlocks Team
Full netbook can be found on the followng website
Liber MysteriumThe Netbook of Witches and Warlocks
This appears to be a normal stick that could be used for a Dowsing spell.
It can cast Dowsing at will.
Caster Level: 3rd; Prerequisites: Craft Wondrous Item, Dowse Market Price: 300 GP