Portable home alert system combining a 50m wirefree door chime with an alarm unit. Kit comes with chime unit, bell push, arming button and P.I.R. The chime and bell push operate as normal, the chime has 8 sounds. the P.I.R. can also activate the 8 melodies. Arming the unit with the arming button then turns on the alarm feature. The P.I.R. will activate the alarm when it detects heat movement.