Additional Information | Magnet unit: Approx. 9/16 x 9/16 x 1 15/32; Magnet unit: Approx. 0.02; Sensor Sensitivity Select Switch; Status IndicationLED (red/green); Easy Setup One Push Pairing; Power Source Lithium Battery (CR2 x 1); Battery Life Approx. 2 years (when window/door is opened and closed 10 times a day, in an environment of 25 °C (77 °F)); Sensor Detection Method; Receive text alerts on your smartphone/tablet; Arm and disarm window/door sensor via your smartphone/tablet; Hub unit required KX-HNB600W |