SAFE TECH Wireless Interlinked Smoke Alarm, Fire Alarm Smoke Detector with Battery Powered and 10 Year Life4 pack by Amazon.co.uk

• 【10 Years Battery & Photoelectric Sensor】 Interconnected Smoke alarm provides 10 years of continuous power with a built-in lithium battery, saving on energy while ensuring the alarm is always on. Photoelectric sensor alarm detects the large particles typical of smoky, smouldering fires while reducing the number of false alarm

• 【Loud 85dB Sound & Hush Button】Battery-powered interconnected smoke alarm features a loud 85-decibel sound alarm, giving you every extra life-saving second to control the fire or evacuate

• 【Interconnect Detector】SAFE TECH detectors feature a Sealed & Tamper proof battery and interlink by radio frequency alarms wirelessly interlink with each other. Interlinked Fire Alarm can be interconnected with up to 20-50 alarms, even in a different room or on a different floor. If one alarm is triggered - All alarms will sound together. Wide Coverage of 20-40m²

• 【Scotland Law Compliant】 SAFE TECH interlinked alarms are 100% compliant with the recent change in Scottish Law. Certified to BS EN14604:2005/AC2008,ISO 9001:2015 Certificate, TÜV Rheinland, ETL .Fully Insured UK Company

• 【Easy Installation】 Smoke detector comes with screws and mounting brackets, easy to install in several minutes since there are no wires needed. Applicable to housing, company, hospital, hotels, warehouse, office, factory, shopping mall, etc