Seajay, all the handhelds have brackets and 12v power adapters. We used a garmin GPS 2 and a Magellan 310, both on dashmounts and 12v leads. The Garmins used to charge a lot more for their brackets ~ £25 vs ~£18. On my new RIB i've got a Garmin Etrex, the mains lead was £15 and the bracket will be £19 when it eventually arrives. Whilst the screens are much smaller than the plotter types, they are OK to view when clipped onto the dashmount brackets. They will also run on the internal batteries if the 12v supply fails for any reason.