Wireless door and window alarm with simple arm and disarm - Compact, easy to operate, and two controls for arm or disarm. You can complete installation in minutes. Long battery life and easy maintenance - Low power consumption provides up to 1 year of use on a single battery. Replacement is straightforward when needed. Visible low battery indicator and strong alarm - LED indicator notifies you of a low battery. The system emits a 120 dB alarm to deter intruders. Tool-free installation on windows or doors - Easily attach to windows or doors with the included double-sided tape. No tools required for setup. Practical doorbell function - Built-in doorbell feature reminds someone inside to open the door for you. Use scenarios - Home entry security: place on the main entrance door to alert you and deter unwanted access while you are at home or away. - Property protection while away: mount on ground-floor windows or patio doors to enhance security when you are not present. - Rentals and small offices: add simple, wire-free security without professional installation or changes to existing structures. Key attributes at a glance - Function: wireless door and window alarm with arm/disarm - Compatibility: suitable for doors and windows; attaches with included double-sided tape - Size: compact and unobtrusive - Material: lightweight, battery-powered unit - Performance: 120 dB alarm, long battery life, low battery reminder with LED indicator - Power: battery operated; replacement easy - Special feature: built-in doorbell function for indoor notifications