$73
The fully waterproof Vivosmart 4 have Garmin's redesigned Elevate heart-rate sensor, new abnormal heart-rate alerts, VO2 max, stress tracking and activities for walks, runs, strength training, pool swims, yoga and more, but it introduces a new wrist-based pulse ox sensor. Works 100% brand new. Barley used! (No box) Size fits large/XL wrists. Other sizes available. $ or best offer. Pickup or delivery available. Usually retails for $150 in box. Just charge it, download the Garmin app to connect with Bluetooth. It comes with a new charger.