Search query: apple watch 4

Product: Fitbit Versa 2 Health and Fitness Smartwatch with Heart Rate, Music, Alexa Built-In, Sleep and Swim Tracking, Petal/Copper Rose, One Size (S and L Bands Included)
Brand: Fitbit
Color: Petal/Copper Rose
Relevance: Substitute
Use amazon Alexa built in to get quick news and information, check the weather, set timers and alarms, control your smart home devices and more all through the sound of your voice (third party app may be required; amazon Alexa not available in all countries)
Based on your heart rate, time asleep and restlessness, sleep score helps you better understand your sleep quality each night. Also track your time in light, deep and REM sleep stages and get personal insights
Control your Spotify app, download Pandora stations and add Deezer playlists—plus store and play 300+ songs on your wrist (subscription required; Pandora is us only)
With a larger display and an always on option, your information’s always a quick glance away (always on display requires more frequent charging)
Track heart rate 24/ 7, steps, distance, calories burned, hourly activity, active minutes and floors climbed

Product: (Renewed) Apple Watch Series 4 (GPS, 44MM) - Space Gray Aluminum Case with Black Sport Band
Brand: Apple
Color: Space Gray Aluminum Case & Black Sport Band
Relevance: Exact
This Apple Watch Series 4 (GPS) 44mm Space Gray Aluminum Case with Black Sport Band is in new-other condition. It is 100% functional and in near perfect cosmetic condition with the possibility of a few light hair marks. It does NOT come in its original packaging. Fundamentally redesigned and reengineered. The largest Apple Watch display yet. Built-in electrical heart sensor. New Digital Crown with haptic feedback. Low and high heart rate notifications. Fall detection and Emergency SOS. New Breathe watch faces. Automatic workout detection. New yoga and hiking workouts. Advanced features for runners like cadence and pace alerts. New head-to-head competitions. Activity sharing with friends. Personalized coaching. Monthly challenges and achievement awards. You can use Walkie-Talkie, make phone calls, and send messages. Listen to Apple Music¹ and Apple Podcasts. And use Siri in all-new ways. Apple Watch Series 4 lets you do it all right from your wrist.
64-bit dual-core S4 processor. Up to 2x faster than S3 processor
Electrical heart sensor (ECG app)
Second-generation optical heart sensor
Fall detection
Digital Crown with haptic feedback

Product: Apple Watch Series 3 (GPS, 42MM) - Space Gray Aluminum Case with Black Sport Band (Renewed)
Brand: Apple
Color: Space Gray Aluminum Case & Black Sport Band
Relevance: Substitute
GPS and a barometric altimeter track how far and high you go
Ultimate sports watch and intelligent activity tracker
Swim proof so you're always ready for the pool or ocean
New dual-core processor for faster app performance