Sanjie Door Alarm with Instant and Delayed Alerts 30s/1min/2min，Door Window Ajar Alarms for Kids Safety/Home Security,Volume 0-110dB,Door Entry Chime for Business,2 Sensor

Get instant security with SanJie's Door and Window Alarm Sensor. This door alarm sensor and window security alarm delivers reliable alerts when doors or windows are opened, perfect as an open door alarm or window alarms when opened. Easy-install window sensors for security provide customizable protection for any entry. Use as a gentle door entry chime for business or a loud home alarm. Compact, portable, and ready to use.

• [Long Alert Description] When triggered, the system activates a continuous, long-duration alert—ideal for door alarms when opened in high-security or kid‑safety scenarios.
• [Waterproof Design] The door Chimes is built with high-quality waterproof materials, ensuring reliable performance in rain, snow, high humidity, and extreme hot or cold temperatures. Ideal for outdoor use on gates, patio doors, or mailboxes.
• [3-in-1 Modes: Alarm / Chime / Mute] Alarm triggers continuous alert for door alarms for kids safety. Chime plays one ringtone and stops—ideal as a door chime for business. Mute activates LED only for quiet spaces.
• [Alarm, Chime & Voice Ringtones – 30 Tones, 5 Volumes] 30 ringtones, 5 volume levels (up to 110dB) for your door sensor chime: loud door alarms for home security, gentle door sensor chime for business, and door chime for when door opens with voice reminder.
• [500ft Wireless Range & Expandable Pairing] This wireless door open chime and home offers 500ft open-area range, reliable 100ft indoors. Avoid metal doors and devices like microwaves/TVs. Expandable: each receiver pairs with up to 9 sensors.
• [Low-Power Battery] Powered by one AAA battery (included). This door sensor alarm consumes less power for fewer battery changes.
• [Easy 2-Step Installation] Get your door entry chime for business or home ready in seconds. Plug in receiver, attach door sensor chime with tape—no wiring, no tools.
• [Versatile Use] Perfect for shop entrances, office doors, bedroom windows, classrooms. Use as door chimes for home, window alarms for home security, or a door alarm sensor for retail.
• [After-Sales Support] 30-day no-reason returns and lifetime after-sales service. Contact us with your order number for manual or video support.