10-piece set of Cordes Mini Smoke Detectors CC-7 The stylish smoke detector CC-7 from Cordes impresses not only with its unique design, which seamlessly fits into any home decor, but also with its size. With a diameter of just 7 cm and a height of only 3.5 cm, it remains discreetly in the background. Thanks to the sensor's self-calibration when dirty and regular self-tests, this smoke detector, equipped with a built-in lithium battery, has a lifespan of up to 10 years. Constantly changing batteries or a low battery alarm that wakes you from sleep are now a thing of the past. But it's not just the design and size that make this smoke detector appealing; its quality is also noteworthy. Certified with the VdS seal, it not only meets the EN14604 standard but also the stricter requirements of VdS 3131. Quality you can rely on.