Swann Wireless Home Doorway Kit Alert Security Alarm, White (SWADS-Alarms-GL) Easy to use do-it-yourself wireless alarm kit for home or business provides peace of mind without breaking the bank Connect in minutes with easy mounting, pairing & convenient wireless operation (uses 3 x AA batteries for Receiver & 6 x AAA batteries for Sensors)^ Position the 2 PIR Alert Motion Sensors where you need protection near entrances, front & back doorways, driveways, garages, shops, restaurants, cafes, reception areas, lobbies, etc The Receiver unit emits an audible alarm & lights up when the Alert Sensors detect movement The PIR Alert Sensors detect motion up to 40ft/12m away with a weatherproof design for monitoring driveways & other outdoor locations