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Product Features:
1. Alert Message: Door sensor sends real alarm signals when doors and windows are opened illegally. Users can receive alarm information remotely on their mobile phones.
2. Real Record: Mobile app records the status of doors and windows, allowing users to check the records anytime and anywhere for added security.
3. Intelligent Linkage: Door window sensor can be connected with other devices to create customized scenes, such as triggering lights to turn on when the door or window is opened.
4. Versatile Function: Contact sensor can the opening or closing of doors, windows, electrical appliances, furniture cabinet doors, and drawers, enhancing home safety.
5. Easy Installation: Simple and tool-free installation using stickers. The sensor is durable and-lasting.

Product Specifications:
- Item Type: Door Window Sensor
- Material: ABS
- Color: White
- Communication Mode: WiFi 802.11 b/g/n
- Function: door, window, electrical appliances, furniture cabinet doors, drawers, and other objects opening or closing
- Battery Type: 2 x LR03 battery (not included)
- Package List: 1 x Door Window Sensor, 1 x Secondary Sensor, 2 x Sticker, 2 x Screw, 2 x Nut Setters, 1 x Reset Pin, 1 x User Manual

Shipping and Payment Information:
- We ship items to your verified address.
- Payment must be received within 3 days from the date of purchase.
- All items will be dispatched within one business day via Airmail after payment is cleared.
- Delivery is usually 10-30 business days, but may vary depending on customs, holidays, weather, and other conditions.
- Some countries like Russia, Brazil, or certain European countries may experience longer delivery times, up to 50 days or more.
- If you haven't received your items in 30 days (Russian customers may need more patience due to local delivery system and/or customs), please contact us instead of leaving negative/neutral feedback or opening a dispute. We will do our best to solve any problems and resend or refund missing items.
- Buyers are responsible for any customs duties or taxes incurred.
- Our listing price includes the value of goods, packaging cost, and export taxes, but does not include international duties.
- Customs duties are the buyer's responsibility. Please check with your country's customs office to determine these additional costs before making a purchase.
- Any disputes arising from customs duties will be submitted to for resolution.

Customer Service:
- If you have any questions, please contact us via message or email. We will reply within 48 hours. If you do not receive a reply within 48 hours, please resend your message as our system may have blocked some emails.
- If you are satisfied with our service, please leave us a positive feedback and provide Detailed Seller Ratings with all "5" in every area.
- Our aim is to provide excellent customer service, and your recognition will greatly encourage us to serve you better. Customer satisfaction is our priority. We strive to exceed your expectations in terms of customer service, communication, and order processing.
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