Do what it is, you get this as not really to say ... Man enters his data, then the stride length is automatically calculated. However, it is also possible to enter the stride itself. The steps that counts the device, are also realistic with me. (I counted over a specified period) Best of all, however, I have the device in the wash in the washing machine by mistake and it funktinierte after drying in the sun again! The steps of the last seven days had then forgotten fright ;-)