Physical dimensions 2.04” x 3.90” x 1.03” (5.17 x 9.90 x 2.61 cm)Weight 3.5 oz (100.0 g) Water rating IPX7 Battery Rechargeable internal lithium ion Display type sunlight-readable, monochrome, transflective memory-in-pixel (MIP) Display size 0.9" x 0.9" (23 x 23 mm) Display resolution 128 x 128 pixels Battery life Up to 90 hours at 10-minute tracking (default); up to 35 hours at 10-minute tracking with 1-second logging; up to 24 days at 30-minute tracking power save mode; and up to 1 year when powered off Memory/History None High-sensitivity receiver Interface USB Maps & Memory Waypoints/favorites/locations 500 Routes 20 Preloaded maps no Outdoor Recreation Features Camera no Additional Additional Wireless compatible: yes (Bluetooth®) Trigger an interactive SOS with 24/7 search and rescue monitoring center: yes Send and receive text messages to SMS and email: yes Send and receive messages with other inReach users, exchange locations: yes Track and share location with friends and family on web-based MapShare® portal: yes Request weather forecasts for current location and planned destination: yes Virtual keyboard for custom text messaging: yes Send waypoints to MapShare portal during trip: yes Send route selection to MapShare portal for friends and family to see progress: yes