Samsung Galaxy Watch 4 Classic 42mm - smart watch with Google Wear OS. 1.2" Super AMOLED display with 396 x 396 px resolution, NFC for Google Pay contactless payments, more conservative design with rotating lunette, Samsung BioActive sensor measures fat, muscle, bone, heart rate, ECG and pressure monitoring, SpO2, 90 sports activities, GPS, sleep monitoring. Hundreds of different apps directly for Google Wear OS in Google Play - unlimited possibilities of using the watch. Integrated microphone, music control, smart home, ability to reply to messages. Water resistance up to 50m - suitable for swimming. Battery life up to 40 hours in normal mode. Compatible with Android phones 6.0 and above with 1.5GB RAM or more.