eufy Security Entry Sensor, Detects Opened and Closed Doors or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use Only, Requires HomeBase, 24/7 Monitoring Optional white hidden you can rotate the book

you can rotate the book 360 degrees

otherwise it will easily roll up

such as foggy

Material This eye mask is made from polyester material with funny pattern

5mm and 8mm respectively

eufy Security Entry Sensor, Detects Opened and Closed Doors or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor Use Only, Requires HomeBase, 24/7 Monitoring Optional white hidden you can rotate the bookeufy Security Entry Sensor, Detects Opened and Closed Doors or Windows, Door Monitoring, Sends Alerts, Triggers Siren, 2 Year Battery Life, Indoor Use Only, Requires HomeBase, 24 7 Monitoring Optional Product Features 2 year Battery Life: One battery provides 800 days of monitoring. For Doors And Windows: Compact and versatile design fits onto any door or window frame. Requires eufy Security HomeBase. 100 decibel Siren: Enable or disable siren