Passive Infrared Sensor Alarm with Keychain Remote Passive Infrared Sensor Alarm General Features: Wireless RFoperation Built-In PIR Sensor: detects motion up to 30 feet (9.1 meters and from an angle of up to 110 degrees Built-In Alarm Siren User Programmable Security Code Entry/Exit Delay Chime Panic alarm Requires four (4) AA batteries (not included) RF Remote Control keychain: gives you simple handheld control of your sensor alarm up to 50 feet