The Ener-J Smart Wi-Fi Wireless Door and Window Sensor pack offers a comprehensive security solution for modern UK homeowners and trade professionals. This set of four high-performance sensors allows you to monitor the status of entry points remotely through a dedicated smartphone application. Designed for versatility, these compact units fit seamlessly onto any door or window frame, providing instant detection of opening or closing actions. Utilising a reliable 2.4GHz Wi-Fi protocol, the sensors connect directly to your home network without the need for a complex hub. Each unit is powered by a long-lasting CR2 battery, engineered to provide up to two years of continuous operation based on standard daily usage. Whether you are looking to secure a residential property or a small office, these sensors provide a professional-grade monitoring system that integrates perfectly with voice-controlled smart home setups including Alexa and Google Assistant. The white minimalist finish ensures they blend discreetly into your existing interior decor while maintaining a vigilant watch over your property around the clock.