【Product Description】 This is a genuine Docomo smart watch. It has a large, easy-to-read screen and is simple to operate, making it recommended for smart watch beginners. It is equipped with functions useful for daily health management, such as step count, heart rate, blood oxygen saturation, sleep, and stress measurement. It supports over 100 sports modes, allowing you to record your workouts. By linking with your smartphone, you can check notifications from various apps, such as calls and LINE, on your wrist. With IP68 water and dust resistance, it's safe for everyday use. The battery lasts for approximately 3-5 days. Compatible with both iPhone and Android (using a dedicated app). 【Smart Watch 01 Specifications】 ・Color: Black ・Size: Approximately 252 x 36 x 11mm ・Weight: Approximately 40g ・Battery life: 3-5 days ・Bluetooth: Ver5.2 ・Supported smartphone OS: iOS 9.0 or later, Android 5.0 or later ・Model number: Z146 【Replacement Belt Specifications】 ・Color: Ivory ・Belt width: Approximately 22mm ・Material: Silicone, Stainless steel