Garmin Montana is available for land, sea, and roads. It is one of the best handheld devices. Two new units are available with the following specifications: Here are the specifications of the Garmin Montana 700 in brief: Screen: 5 inches, color, touchscreen (even with gloves), and sunlight-readable. Durability: Military-grade design, shock and heat resistant, and waterproof (IPX7 standard). Satellites: Supports 3 systems (GPS, GLONASS, GALILEO) for very high accuracy. Battery: Rechargeable, lasts 18 hours (normal mode) and up to 330 hours (power saving mode). Sensors: Electronic compass, barometric altimeter, and weather sensor. Maps: 16 GB memory, supports satellite imagery and land/desert maps. Connectivity: Supports Wi-Fi, Bluetooth, and the Garmin Explore mobile app. Land and sea maps