Remote control wirefree alarm kit contains: 1 x external siren box with LED strobe, 1 x passive infra red detector, 2 x Magnetic door / Window contacts, 1 x remote control, 1 x set of batteries, 1 x fixings pack, 1 x installation & operations manual Totally Wirefree, simple & quick to install Tamper protection & jamming detection facilities incorporated Armed / disarmed via a remote control unit Simple to expand with full range of accessories Non volatile memory (NVM) will not lose programming on mains failure Battery low indicators on PIR & magnetic contact detectors & remote control