Waterproof & Durable: This smart ring is IP68+5ATM rated waterproof, which means it's suitable for swimming, diving, and other water activities down to a depth of 50 meters. Made of stainless steel and epoxy resin, it is built to withstand daily use and harsh conditions. You can safely wear it in any situation without worrying about damage. This ring is perfect for active individuals who want to monitor their health and fitness without having to take off the ring. Health Monitoring: Monitor your health with the built-in heart rate monitor. The ring can track your heart rate throughout the day and provide detailed data analysis via the RWFIT app. Gain insights into your sleep quality with the sleep monitoring feature, which tracks sleep patterns, sleep duration, and sleep quality. Analyze your sleep and get tips to improve your sleep routine. This ring helps you understand your body better and take control of your health. Stay connected: Get notifications right on your ring for calls, messages, and app notifications from popular platforms like Skype, Facebook, WhatsApp, Instagram, and more. The ring flashes with a white light for incoming calls and a blue light for messages, so you never miss important information. Customize your notification settings in the RWFIT app to filter out unimportant notifications and focus on what's important. Specifications: Color: Silver Material: Stainless steel + Epoxy resin Size 8: 2.3 x 2.3 x 0.8 cm Size 9: 1.9 x 5.96 x 1 cm Size 10: 1.99 x 6.24 x 1 cm Size 11: 2.07 x 6.49 x 1 cm Size 12: 2.15 x 6.75 x 1cm Water resistance: IP68 + 5ATM Bluetooth: 5.0 Battery capacity: 16mAh Charging time: 1 hour Standby time: 16-20 days Usage time: 4-5 days Package includes: 1 x Smart Ring 1 x Charging dock 1 x User manual 1 x Charging cable