The 3 Firex KF20 Mains Powered Optical Smoke Alarm with Alkaline Back-Up Battery is a high-quality smoke detector by Kidde. This unit is powered by a hardwired battery with an alkaline back-up, ensuring continuous protection even during power outages. Featuring a white colour and sleek design, this smoke alarm is perfect for home security. With an operating sound rating of 85 dB, this unit is lightweight at 242g and includes 1 battery for operation. Manufactured in 2023, this smoke alarm is a reliable and efficient choice for safeguarding your home. 1 has a missing connector 1 has 2 wires cut short 1 is complete SEE PICTURES NO RETURNS