Check your doors and windows from your smart device with this Eve Systems Door & Window Wireless Contact Sensor. FEATURES: Check your door or window: See the current open/closed state at a glance., Create automations to control other connected devices in your home whenever doors or windows are opened or closed., Receive activity notifications to stay informed., Truly wireless: Powered by a long-lasting, replaceable battery., Matter-enabled to let you seamlessly monitor your home across smartphones and voice assistants of all major platforms., Get up and running in a flash with quick & easy set up, requires hub (not included)., Cutting-edge Thread network technology for a robust smart home; enhances the stability and reach of your Thread network., 100% Privacy: No Eve cloud, no registration, no tracking. Local communication without cloud dependency. DETAILS: Compatible with Alexa, Google Assistant, HomeKit, HomeKit over Thread, and Samsung SmartThings, Operating system: iOS/iPadOS 18.1 (or later) / Android™ 8.1 (or later), 2" x 0.9" x 0.9", Weight: 0.25 lb., Uses 1 rechargeable AA battery (included), Imported, Manufacturer's 2-year limited warranty: For warranty information please click here - https://cs.kohls.com/app/answers/detail/a_id/140, Model no. 10038002. Size: One Size. Color: White. Gender: unisex. Age Group: adult. Material: NONE.