Philips JDT3693W/37 Window Door Alarm 10 Pack

The Philips Personal Security Window and Door Alarm 10-pack provides a simple, no-frills approach to home security by covering up to 10 entry points with standalone magnetic sensor alarms. Each unit consists of two pieces — an alarm body and a magnetic contact — that are mounted on a door or window frame using the included double-sided adhesive tape. When the door or window is opened and the magnetic contact separates from the alarm body, a piercing 120-decibel siren sounds to alert occupants and discourage unauthorized entry. A three-position switch on the side of each alarm lets you select Off, Chime, or Alarm mode, making these units equally useful as entry notification chimes for families who want to know when children open exterior doors.

Each alarm runs on four LR44 button batteries, all of which are included in the box, and a built-in battery test button with a low battery indicator helps you stay on top of power levels. Because these are fully standalone units with no wiring or hub required, installation takes just seconds per unit and can be completed without any tools. The 10-pack quantity makes it practical to outfit an entire home — covering front and back doors, garage entries, and ground-floor windows — at a fraction of the cost of a connected alarm system. While they lack smart home integration or remote notifications, they deliver reliable, immediate audible alerts wherever they are placed.