The Smoke Detector ISD-SD1 has an elegant and small design (only Ø 7 cm), with reliable photoeletric technology. It has a fixed built in Lithium 10 Year Battery as well as a reliable photoelectric detection and a powerfull siren with 85dB volume. The Installation ins easy and mounting accessoires are included. The complete surface is a large test button and a silence button. Moreover it is a high quality product with German VdS approval, EN14604, Q-Label as well as AF-Afnor.