• (Amazing Multi-Function) JUSUTEK Smart Watch, Includes Screen + Touch, Stainless Steel Ring, Numerical Stabilization Sensor Function, Multiple Numerical Display, Remote Control Shooting, Experience Games, Multi-functional Exercise, Female Functions, Bluetooth 5.2, Pedometer, IP68 Waterproof, Calories, Long Time Use, Unisex, iPhone & Android Compatible, Gift, Japanese Instruction Manual Included (English Language Not Guaranteed) • 【Please measure your finger circumference before purchasing】 Compatible smart ring model perimeter size: No. 7 (inner perimeter: 55 mm)/ 8 (inner perimeter: 57.5 mm)/9 (inner circumference: 60 mm)/10 (inner circumference: 62.8 mm)/11 (inner circumference: 65.4 mm)/12 (inner circumference: 67.9 mm),finger circumference); How to measure the perimeter: 1. Wrap a strip of paper or string around your finger. 2. Mark the wrapped area 3. Measure the marked area with a ruler and check the length • Long Time Use: Can be used for more than 15 days on standby, smart ring electric capacity: 15 mAh, ring can be used for 3 - 4 days • IP68 Waterproof Technology: Fully enclosed structure, 5 ATM waterproof technology, easy to use for daily use, supports swimming, hand washing, shower, etc. Suitable for various waterproof needs *Note: Please remove the ring after a bath to avoid skin damage caused by residue of bath items inside the ring • Quality Assurance: Our products have undergone strict inspection from production to delivery. Use with confidence. Unused product may be damaged due to delivery or other reasons, so if the product received is broken or dirty, please contact us by email. Contact Procedures: Please feel free to contact us through "Account Service" → "Order History" → "Contact About This Order"