A handheld GPS device comes in handy while hiking as it lets you navigate your way easily when the visibility is poor or the landscape has little or no distinct features.
Here is a list of the best GPS devices you could own –
Garmin eTrex 30 Worldwide Handheld GPS Navigator
SATMAP ACTIVE 12 WITH FULL GB 1:50K BUNDLE
Garmin GPSMAP 64st, TOPO U.S. 100K with High-Sensitivity GPS and GLONASS Receiver
Garmin 72H Waterproof Handheld GPS with High-Sensitivity