VIS1355 provides early warning of developing fire by issuing both sound and transmitted alarms. To ensure secure communication, transmissions use a PowerCode 24-bit ID command code, unique and virtually impossible to accidentally reproduce. Transmits supervisory reports including battery condition to the wireless control panel or receiver at regular intervals. Sound and transmitted alerts for smoke, tamper and low battery. The sensor is Fully supervised and has anti-collision transmission algorithm to prevent jamming. There are 16 million possible combinations. The sensor is powered by a Long-life 9V alkaline or lithium battery. Installation is Simple as the detector can be ceiling-mounted and Easily programming.