Galaxy Watch6 , OLED , 3.3 cm (1.3") , Display type Digital , Display resolution 432 x 432 pixels , Touchscreen Yes , Watch glass type Sapphire , Operating system installed Wear OS , RAM capacity 2000 MB , Flash memory 16 GB , Band material Fluoroelastomer/Leather , Band size One Size , Shape Round , Watch case size 43 mm , Watch case colour Black , Watch case material Stainless steel , Band colour Black , Heart rate monitor Yes , Near Field Communication (NFC) Yes , Wi-Fi Yes , Bluetooth version 5.3 , Battery type Built-in battery , Battery technology Lithium-Ion (Li-Ion) , Battery capacity 300 mAh , Battery life (max) 40 h , Charging time 1.33 h , Weight 52 g