Garmin  GPSMAP 66ST

General:
Physical dimensions2.5" x 6.4" x 1.4" (6.2 x 16.3 x 3.5 cm)
Display size1.5"W x 2.5"H (3.8 x 6.3 cm); 3" diag (7.6 cm)
Display resolution240 x 400 pixels
Display typetransflective color TFT
Weight

8.1 oz (230 g) with batteries

Battery2 AA batteries (not included);
NiMH or Lithium recommended
Water ratingIPX7
Memory/History16 GB
High-sensitivity receiverYes
InterfaceHigh-speed USB and NMEA 0183 compatible
Maps & Memory:
Preloaded mapsyes (topographic)
Ability to add mapsYes
BasemapYes
Storage and Power CapacitymicroSD™ card (not included)
Waypoints/favorites/locations10000
Routes250
Track log20000 points,
250 saved gpx tracks,
300 saved fit activities
Sensors:
Barometric altimeterYes
CompassYes (tilt-compensated 3-axis)
Outdoor Recreation Features:
Area calculationYes
Automatic routing (turn by turn routing on roads)Yes (with optional mapping for detailed roads)
Geocaching-friendlyYes (Paperless)
Custom maps compatibleYes
Hunt/fish calendarYes
Sun and moon informationYes
Picture viewerYes
Garmin Connect™:
Garmin Connect™ compatible (online community where you analyze, categorize and share data)
Additional:
  • Garmin Explore compatible: yes
  • Garmin Connect IQ compatible: yes
  • Wireless compatible: yes (Wi-Fi, Bluetooth and ANT+)
  • Map segments: 15,000
  • Active weather: yes
  • Smart Notifications: yes
  • Live Tracking: yes (with Garmin Connect™ Mobile)
  • BirdsEye direct to device: yes (no annual subscription required)
  • MIL STD 810G ruggedness for thermal, shock and water performance
  • RINEX Logging: yes