I bought one of these from a seller in the UK, Gomatics, got ripped off.
The unit didn't work, when I asked for help they got real arrogant and started blaming me and my Raymarine Chartplotter Radar
setup. It was supposed to be an easy Raymarine
After about 20 hours of trying everything including a laptop
and hyperterminal, they said they would send a replacement. I waited 4-5 weeks followed up and they claimed they never recieved mine back.... Basically they had no intention of replacing it.
Net is save your money
, buy a real GPS
from a real company, not a cheap
chinese copy from a company run out of some kids
Moving on, I bought a Huminbird 50 channel, it worked right out of the box, nice fast aquire, only drawback is it draws lots of power.