Additional straps included as a gift■ Waterproof Level: IP67 (Daily Life Waterproof)■ Charging time: about 1.5 hours■ Wristband size: Length 226.6mm Width 23mm* The app is available in Japanese, and most settings can be operated from the smartphone app.* Equipped with a variety of sensors with very high accuracy.* The dedicated app is available in Japanese, so it is very easy to understand and very convenient.・Notification function (SNS)・ Customize the dial (download from the dedicated app)■ You can also pair it with your smartphone and check your exercise record, blood pressure, heart rate data, blood oxygen record, etc. from the dedicated app. It is very useful for daily life and health management.■ Also, you won't miss notifications of incoming calls, messages, social media, etc.LINE and Twitter messages are notified in real time.■ It is dustproof grade 6 and waterproof grade 7, so there is almost no dust inside. In addition, it is waterproof grade 7, so it is more than life waterproof.■ Measure your current blood pressure, heart rate, blood oxygen, and more in real time. In Sport mode, you can track and see the number of steps, calories burned, heart rate, and duration measured for each type of exercise to maximize the effectiveness of your training.It also has a 24-hour sleep analysis so you can learn more about your sleep habits. However, the measurement results should not be used to diagnose, treat, or prevent disease. Please use a medical device for accurate measurements.* This product is for health management use only, not a medical device.・Instruction manual (English and Chinese)* An outer box is also included.iPhone, Android SmartphoneWe inspect all products, but in the unlikely event that there is an initial defect in the product, we will respond in good faith.This product is a ISO9001 certified product from an excellent manufacturer.