Uk used Apple watch Series 3 38mm GPS

Second-generation Retina OLED display, 1000 nits
Ion-X glass display
GPS model
S3 SiP with dual-core processor; W2 wireless chip
Digital Crown
Optical heart sensor
High and low heart rate notifications and irregular heart rhythm notification1
Emergency SOS2
Water resistant 50 meters3
Wi-Fi and Bluetooth 4.2
GPS/GNSS and barometric altimeter
Built-in speaker and mic
8GB capacity