When you go to a sauna or a large public bath, you sometimes lose track of time. This is especially true in places you're not familiar with. That's why a smartwatch is a must-have for sauna and bath enthusiasts. The color is black. Please check the photos carefully before purchasing. Personally (as seen in the third photo), I previously purchased a different color and always use it in an 88-degree sauna room. Compatible with iPhone and Android. Basic Usage: The smartwatch vibrates to notify you of incoming calls, LINE messages, and emails. You can also monitor your sleep environment, such as deep sleep and light sleep. ⚫︎ Smartwatch, wristband type ⚫︎ Includes charging cord ⚫︎ Waterproof ⚫︎ Watch with a 1.47-inch large screen, full touch Smart Watch ⚫︎ 24-hour call notification ⚫︎ Sleep tracking ⚫︎ Multiple exercise modes ⚫︎ Weather forecast ⚫︎ Customizable watch face ⚫︎ Includes Japanese instruction manual ⚫︎ Blue Clot Returns and complaints are not accepted after purchase. Thank you for your understanding. Sauna