This product links with a smartphone app, allowing you to manage 8 different types of data changes on your smartphone. - Model Name: bind - Measurement Functions: Weight, BMI, Body Fat Percentage, Muscle Mass, Water Ratio Recording, Visceral Fat, Bone Mass, Basal Metabolism - Connection Method: Smartphone app link - Power Supply: 2 x AAA batteries (sold separately) - Body Size: Approximately W260 x D27 x H260mm - Maximum Measurement Range: 180kg - Up to 8 users can be registered - This product requires a smartphone (sold separately) To use this product, you need to download the dedicated app (free) to your smartphone. - Data can be graphed to show daily changes. ◎ Available for immediate purchase ◎ Please note that this is an unused item but has been stored at home. ◎ Opened once for inspection and photography. ◎ Warranty included with the product is not applicable. Thank you for viewing.