Scandinavian design is cool. However, this specific example from the manufacturer Cautiex only comes to the forefront as an effective savior of life, safety, and home furnishings in particularly heated situations: The Invisible is probably the smallest smoke detector since the discovery of fire. Its state-of-the-art fire detection electronics with a photoelectric sensor and high-quality craftsmanship ensure a long lifespan. The integrated lithium battery from JO-EL lasts on average five years, and the power supply can be checked via a control signal. Cautiex delivers the prime example of Scandinavian design, complete with mounting materials. Awards: iF product design award 2011, Plus-X-Award 2012, reddot design award 2013.