Key benefits - Immediate alert when a door is opened: The wireless door alarm triggers as soon as a door is opened, helping protect children and deter theft in homes, offices, or factories. - Anti-theft protection for any setting: Hang the door alarm sensor on a door or window to improve safety in hotels or other accommodations; after check-out, it is ready for reuse. - Compact and portable for home or travel: The small wireless unit fits easily on entrance doors, bedroom doors, houses, apartments, hotel rooms, or dorms, wherever you go. - Easy, tool-free installation: No wiring required; simply hang the alarm on the inside of your door handle for quick setup in homes, apartments, dorms, or during travel. What it does and key attributes - Function: Wireless door alarm sensor that triggers immediately when the door is opened. - Compatibility: Designed to be hung on doors or windows. - Size and form factor: Compact design optimized for portability and discreet use. - Performance: Reliable wireless operation with immediate response to door movement. Use scenarios - Home, office, or factory doors: Install on interior doors to alert you when a door is opened, helping to keep children safe and to deter unauthorized access. - Hotels and accommodations: Place the sensor on doors or windows to enhance safety; after check-out, it can be prepared for reuse. - Travel, dorms, and rentals: Use on entrance doors or bedroom doors in apartments, hotel rooms, dorms, or other living spaces for added security while away from home. Installation guidance - No wiring required: Hang the alarm on the inside of the door handle for a clean, simple setup. - Suitable for homes, apartments, dorms, or travel: Quick to install and ready to use without tools.