GPS-GPS,MODEL:GPSMAP 64SC,DIMENSIONS:2.4X6.3X1.4 INCH(6.1X16.0X3.6CM) (LARG X ALT X PROF),SIZE DISPLAY:1.43 INCH X2.15 INCH (3.6X5.5CM)-( LARG X ALT) – 2.6 INCH (6.6 CM) DIAGONAL,DISPLAY RESOLUTION:160X240 PIXELS (LARG X ALT),DISPLAY TYPE: TRANSFLECTIVE 65K TFT COLOR,POWER SUPPLY: NIMH RECHARGEABLE BATTERY PACK(INCLUDED) OR 2 AA BATTERIES (NOT INCLUDED)-(RECOMMENDED NIMH OR LITHIUM), IMPERMEABILITY CLASSIFICATION: IPX7,INTERNAL MEMORY: 4GB,REFERENCE MANUFACTURER:010-01199-30,MANUFACTURER:GARMIN