Note:Apple phone can not download APP， only part of the function to supportFeatures:1. Multifunctional for both decorating and answering phone calls2. Bluetooth connection with your mobile phone within 10 meters distance theoretically3. Capable for picture taking， step counting， sleep scheduling etc.4. Low power consumption to free you from frequent charging5. High sensitivity for quick and accurate react and informingSpecifications:1. Material: Metal2. Weight: 2.08oz / 59g3. Color: Black & Silver4. Dimensions: (7.48 x 0.79 x 0.39)" / (19 x 2 x 1)cm (L x W x H)5. Inner Perimeter: 160mm-230mmPackage Includes:1 x Smart Bracelet1 x User Manual1 x USB Cable