Easy to use do-it-yourself wireless alert kit for home or business provides peace of mind. No hub, internet, or phone connection required. Connect in minutes with easy mounting, pairing & convenient wire-free operation (uses 3 x AA batteries for Chime Receiver & 3 x AAA batteries for Sensor - not included). The PIR Alert Sensor detects motion up to 13ft/4m away with a weatherproof design for monitoring driveways & other outdoor locations.