Product Price Battery Life (hours) Heart Rate Monitor GPS Accuracy (meters) Water Resistance (meter) Weight (grams) Screen Size (inches)
Garmin Garmin Instinct 3 Solar
US
£223.86 unlimited in smartwatch mode with sufficient sun; 28 days smartwatch (45mm) or 40 days smartwatch (50mm) without solar; 130 hours GPS (45mm) or 260 hours GPS (50mm) with solar Multi-band GNSS with SatIQ (GPS, GLONASS, Galileo) 10 ATM (100 m) 42 g (45mm) or 59 g (50mm) 0.9 in (45mm) or 1.1 in (50mm) MIP with solar

Rugged outdoor GPS watch with solar charging, multi-band GNSS (SatIQ), MIL‑STD-810 build, and long GPS battery endurance. Available in 45mm and 50mm sizes with a MIP solar display, Elevate wrist heart-rate sensor, LED flashlight, and 10 ATM water resistance - suited for long hikes and harsh conditions.

★ Ideal for

Ideal because it has a metal‑reinforced bezel, MIL‑STD‑810 thermal/shock resistance, 10 ATM water resistance, multi‑band GPS with SatIQ, and solar charging that provides effectively unlimited smartwatch battery life in sun.