TrailPilot 2 Features: + Liquid-filled analog map compass with set declination + Digital thermometer, user selectable °F or °C display + Working range –4°F to +131°F (-20°C to +55°C ) + Carabiner clip + 3-1/2” x 2-1/2” x 3/8” (8.9 x 6.4 x 1cm) + 1.5oz (42.5g) + Consumer serviceable battery (1 SR1120W)