The following is Open Game Content from a 3PP Source
Ring of Spying
Aura faint divination; CL 7th
Slot ring; Price 10,000 gp; Weight —
Rings of spying are very popular with sycophants, as well as with rogues, rangers and courtesans. The ring appears to be a plain brass or bronze band with no decorations or setting. For seven minutes each day the wearer of a ring of spying can create an arcane eye as per the spell. The seven minutes do not have to be consecutive and can be spread out throughout the day.
Requirements Forge Ring, arcane eye; Cost 10,000 gp