Garmin Forerunner 735XT - Midnight Blue & Frost Blue Measures heart rate at the wrist so you can run freer on race day. Display size: 1.23 inch diameter and display resolution: 215 x 180 pixels Provides advanced dynamics for running, cycling and swimming, including ground contact time balance, stride length, vertical ratio and more Offers VO2 max estimate, lactate threshold, race predictor and recovery advisor. Water rating: 5 ATM Connected features: smart notifications, automatic uploads to Garmin Connect, live tracking and more. Display type : sunlight-visible, transflective memory-in-pixel (MIP) Customize with free watch faces, apps and more from our Connect IQ store. Physical size 44.5 x 44.5 x 11.9 mm