Switchbot Smart Motion Door Sensor - Wireless Home Security System, Pir Motion Product Features [Motion Sensor Detects Your Movements] With a motion detection range of up to almost 30 feet within 110 horizontally and 55 vertically, there?s more than enough range to secure an entire room of your home. You?re also able to customize the sensitivity settings so that you are only alerted to movements that matter to you. With the built-in light sensor, it will automatically trigger the SwitchBot Bot to turn on the light if someone moves when the environment gets dark. [Easy to Install Long Battery Life] Thanks to its small and wireless design, SwitchBot Motion Sensor can be installed and set up in seconds. You can place it anywhere since its magnetic flexible base can be inserted to the bottom and side. The included battery provides up to 3 years of power for round-the-clock security. [Part of SwitchBot Ecosystem Compatible with Alexa] Connect Motion Sensor with other SwitchBot products and set up a ?Scene? in the SwitchBot app. When you come home, SwitchBot Bot (button pusher) will automatically be triggered to turn on the light, and Alexa will say ?welcome home?. When you leave, SwitchBot Indoor Camera will automatically turn on to detect indoor activity while you?re away (SwitchBot Hub Mini required) [Remote Alert Notification] You will receive a notification if a suspicious person enters the house while you are away. [Energy Money Saving] By detecting the room vacant, Motion Sensor automatically turns off the lights, reducing unnecessary energy consumption to save you money. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!