Annual fee for sending measurements via the Esders Connect app (Android, iOS, Windows) by means of a flat rate. The annual fee must be paid in advance (prepaid) and is due at the time of booking. It is device-specific, can be renewed at any time and also be paid for several years in advance in order to plan the period of use long-term. When the term expires, measurements can still be sent. However, these are billed individually and debit the measurement quota. The credit for this can be recharged via the measurement package (item 222550).