PDA

PDA has all of the activated abilities of Platinum Watch, Depth Meter, Compass, Radar, Tally Counter (and the tally counters), Lifeform Analyzer, DPS Meter, Stopwatch, Metal Detector, Fisherman's Pocket Guide, Weather Radio, and Sextant.
Combine {4} Magic Mirror, Magic Conch, Demon Conch becomes Shellphone