Just boughta new ranger and 2 hds7 touch units to install on it. Unfortunatly its November so i will have to sit around and stare at it for the next 4-5 mths. can set up and play with these units off the boat? i have heard of a adapter to plug in to do it but not sure if i would just be screwing things up or actually doing some good on learning how to read them.

You should be able to power them up with any 12v power source. That's what I did with my 798ci SI last winter. It woun't work in regular mode but you should be able to get it to work in simulation mode where you can learn to adjust the settings to your liking

No pics of the boat?

soon as i figure out how to get them on here i will post. that says alot about my skills with computers and fish finders dont it!

could not get pictures posted here so i put them in an album on the pictures tab. will try to figure it out for the future.

Buy a spare Head Unit power cable from Lowrance. I think they run about $35. Take one of batteries out of the boat and set everything up in your shop. You can practice all winter long.

You don't need a battery to power the unit in your house.

Just go to Radio Shack and get a A/C-D/C converter and a plug for the power cord like this.