This product is either discontinued or we cannot get that from suppliers.
Dimension: 6.6 X 15.2 X 3.0 cm, Display Size: 4.1 X 5.6 Cm; Diag 6.6 cm, Display Resolution: 160 X 240 Pixels, Display Type: Transflective, 65-K Color TFT, Weight: 218.3 g With Batteries, Battery Type: 2 AA Batteries (Not Included); NiMH or Lithium recommended, Battery Life: 20 Hours, Waterproof: IPX7, Memory/History: 1.7 GB.
For boaters and water sports enthusiasts who want to run with the best, the rugged GPSMAP 78s features crisp colour mapping, high-sensitivity receiver, new moulded rubber side grips, plus a microSD card slot for loading additional maps. And it floats!