WRIST BASED HEART RATE - Forerunner 235 utilizes Garmin's very own wrist based heart rate sensor that tracks 24/7.
LARGER SCREEN - A 44% larger screen than the 225 but the same physical size. BATTERY LIFE - 12 weeks in watch mode and 12 hours in training mode.
AUDIO PROMPTS - Receive audio prompts from your connected smartphone that include laps and lap times.
SMART NOTIFICATIONS - See incoming email, text messages, call alerts, calendar reminders and more from your compatible smartphone.
Display size : WxH - 1.23" (31.1 mm) diameter, Physical dimensions : 1.77" x 1.77" x 0.46" (45 x 45 x 11.7 mm).