The eufy Security Entry Sensor is the perfect addition to your home security system. This sensor detects when doors or windows are opened and triggers your HomeBase siren while sending instant notifications to the eufySecurity app. With a long-lasting 2 year battery life and easy wall mounting you can install this sensor in seconds. The eufy Entry Sensor allows you to monitor multiple entry points in your home providing round-the-clock protection. Thanks to the 1 year warranty you can have peace of mind knowing your home is safe and secure. With motion detection capabilities and seamless connectivity this entry sensor is the ideal way to enhance your eufy security system. Monitor your home day and night while avoiding false alarms with this innovative smart security device. The manufacturer's part number for this product is T8900CD4. For total home security add the eufy Entry Sensor to your cart today.