Instantly protect any space with the Simtek Duo Portable Security Sensor. The Duo security sensor provides security wherever you place it. Likewise, you’ll receive instant notifications if anyone tampers with it. The standalone sensor doesn’t require Bluetooth, WiFi or external power to do its job. Plus, it comes with one-year battery life though you can quickly recharge it whenever you need to. Setting up Duo is easy. Just place it in any dark and motionless space, such as a drawer, cabinet, car or safe. Either motion or light triggers Duo, causing it send an SMS alert to your mobile device right away. Additionally, Duo uses a global cellular modem and works in more than 200 countries without requiring extra setup. Duo is tiny enough to fit in the palm of your hand, so it works in spaces of any size.