So long as Wiliot tags are in range of a suitable energy source, they will continue to harvest and transmit accordingly. The physical lifespan is a function of the tag conversion and operating environment. Generally, Wiliot focuses its first production batches on simple paper stickers, but Wiliot partners aim to have more durable conversions available in the future for use cases in harsher environments. Any existing conversion processes should be applicable in the future. We suggest discussing details with converters, as this can vary depending on the requirements and price may be affected consequently.