Fishing Rod of Alertness is an uncommon Miscellaneous item which can prevent the Surprised condition, as long as nothing unexpected happens.
The wielder of this rod cannot be Surprised, unless something unexpected happens.
Properties
Miscellaneous Items
Rarity: Uncommon
Weight: 1 kg / 2 lb
Price: 55 gp 
UID
UNI_HAV_Thiefling_FishingRodUUID
a366a1b3-2338-434a-9815-97243bb1821e
Where to find
Can be bought from Mattis.
Notes
As per the description, cannot actually prevent being Surprised.