Searching for a GPS Unit in GPS technology and devices Posted April 24, 2008 · Edited April 24, 2008 by sanramonhunter You need to qualify your question a little more. 1.) What kind of audible alerts do you want? Are beeps for turns ok or do you want a voice to say "turn right on elm street"? 2.) does it need to be waterproof? 3.) Price range 4.) Primary use Auto routing or Hiking/Geocaching? 5.) What size screen (handleds usually have small 2-3 inch screens while the autounits have screens 4 inches and up. Unforunatelly there isn't a perfect device out there yet that does both autorouting with voice prompt and a really good job for geocaching. Most people recomend buying 2 devices one for the car and a handheld for caching.