Apple

GPS + Cellular model lets you call, text, and get directions without your phone
Large Retina OLED display
Up to 2x faster processor than Series 3

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LEAVE YOUR PHONE IN YOUR POCKET: Apple Watch SE GPS Model lets you call, text, and get directions from your wrist, while leaving your phone in your pocket. It offers multiple connectivity options, including: Bluetooth, Wi-Fi, and NFC to suit your needs, whatever they might be.
LARGE RETINA OLED DISPLAY: The SE sports a bright LTPO OLED Retina display, giving you a bright screen you can view at a glance, even in bright sunlight. A variety of watch faces are available for the SE watch, including faces that provide essential information for specific activities.

Renewed products look and work like new. These pre-owned products have been inspected and tested by Amazon-qualified suppliers, which typically perform a full diagnostic test, replacement of any defective parts, and a thorough cleaning process. Wireless devices have batteries tested to have at least 80% capacity relative to new at the time of sale. Packaging, wall plug and charging cable may be generic (headphones not included). Wireless products on Amazon Renewed come with the 90 day Amazon Renewed Guarantee.
Cellular keeps you connected with just your watch; GPS and a barometric altimeter track how far and high you go
New dual-core processor for faster app performance; Ultimate sports watch and intelligent activity tracker

LEAVE YOUR PHONE IN YOUR POCKET: Apple Watch Series 3 GPS Model lets you call, text, and get directions from your wrist, while leaving your phone in your pocket. It offers multiple connectivity options, including: Bluetooth, Wi-Fi, and NFC to suit all of your possible needs.
LARGE RETINA OLED DISPLAY: The Series 3 sports a bright OLED Retina display, giving you a bright screen you can view at a glance, even in bright sunlight. A variety of watch faces are available for the watch, including faces that provide essential information for specific activities.
LOADED WITH FEATURES: When paired with your iPhone, you can make calls and send texts from your wrist, navigate with Maps, buy items with Apple Pay, and use your voice to activate Siri. Made to last in almost any kind of weather, the Apple Watch Series 3 is water-resistant up to 164′.

GPS
Always-On Retina display
30% larger screen

GPS Only
Always-On Retina display
30% larger screen

GPS model lets you take calls and reply to texts from your wrist
Measure your blood oxygen with an all-new sensor and app
Check your heart rhythm with the ECG app