Screenshot from aliexpress that shows a watch with a green velcro strap. The watch itself has a round casing made from transparent acrylic sheets that is around 5 cm in diameter. Inside the casing a circuit board is visible, with through-hole mounted components, including a microprocessor in DIP package, 7-segment LED display, a battery holder, and pair of push-buttons.
https://media.metalhead.club/media_attachments/files/113/044/095/151/964/421/original/2250043b07db4eb4.png