If you have a pacemaker you are not allowed to take a body composition measurement. The BIA technology, read more about the technology here: How does TANITA measure body composition?, can negatively influence the functioning of the pacemaker.
If you have a pacemaker, the total weight can be measured. Make sure you enable the 'weight-only' option. Consult the instruction manual of your scale to see how you can enable this option. You can find the instruction manual of your scale on the product page on our website. Here you can also find more information about the 'weight-only' function: I only want to measure my weight. How can I do this?