Kupu 10 by Harri Koskinen is a battery-powered smoke alarm intended for domestic use. Kupu 10 is an upgraded version of our classic Kupu Original Smoke alarm. Non-replaceable 10-year Lithium battery Completes your interior design in style Kupu has a unique textile surface making its appearance very smooth The entire front surface functions as a test button Fast installation with an adhesive tape Tested and certified in EU Mounting plate included