Woot offers Samsung Galaxy Smart Watch 4 40 mm LTE Unlocked with ECG Monitor, GPS, Fall Detection- US Model (Your Choice) for $179.99 (orig. $299.99) + free shipping with Prime.

Product Description:

Body Composition Analysis
Get ready to crush your wellness goals with body readings right on your wrist. 
ECG
Be smart about your heart with real-time ECG Monitoring that gives accurate readings.
VO2 Max / Advanced Run Coaching
Make the most out of every mile with Advanced Run Coaching and VO2 max readings to assess your cardio levels.
Upgraded OS
Tap into the power and convenience of select Google services and apps on your wrist.
Advanced Sleep & Continuous SPO2
Wake Up Feeling Refreshed And Recharged With Advanced Sleep Tracking. Galaxy Watch4 Sleep Tracker starts monitoring your sleep And Spo2 levels continuously. Manage your overall sleep quality for a great night's sleep with an advanced tracker that calculates your sleep score.

Fitness/Auto Workout Tracking
Make the most of every workout with Auto Workout Tracking that recognizes 6 popular activities, from running to rowing to swimming, automatically in just 3 minutes. Stay motivated by connecting to live coaching sessions via your smartphone or to dynamic Group Challenges with your friends.
Extension of Your Phone
Galaxy Watch4 Classic works as an extension of your phone so you can talk, stream and text from your wrist on the go.
LTE Connectivity
No phone or Wi-Fi? No problem. Stay connected wherever your workout takes you, thanks to LTE connectivity. Call, Text And Stream Without Your Phone. (LTE Service Required)