Black Smartwatch with Metal Strap

This image showcases the rear of a stylish black smartwatch, emphasizing its dark, reflective casing and the intricate details of its ceramic back, including the four heart rate sensors. It's complemented by a matching black metal link strap, which wraps around, highlighting its robust design. The digital crown and a side button are also visible on the watch's side, offering a comprehensive look at this modern wearable.

smartwatch - apple watch - black - metal strap - wearable - tech