Annual fee for sending measurements via the Esders Connect app (Android, iOS, Windows) in the form of a flat-rate subscription. The subscription is paid in advance and is due at the time of booking or annual renewal. It is automatically renewed for a further year unless cancelled. To cancel, the serial number of the relevant measuring device must be provided. Measurements can still be sent after the cancellation takes effect. However, these will be billed individually and will be deducted from the measurement quota. The credit for this can be topped up via the measurement package (item 222550).