Garmin Montana 610

2.9" x 5.7" x 1.4" (7.48 x 14.42 x 3.64 cm), 2"W x 3.5"H (5.06 x 8.93 cm), 4" diag (10.2 cm), 272x480, bright, transflective 65k color TFT, dual-orientation touchscreen, sunlight readable, Touchscreen, rechargeable lithium-ion (included) or 3 AA batteries (not included), NiMH or Lithium recommended, up to 16 hours (lithium-ion), up to 22 hours (AA batteries), IPX7, High-sensitivity receiver, Barometric altimeter, Electronic compass, Built-in memory 4 GB,