The Texecom GHA-0002 Premier Elite Micro Contact-W 868MHz Grey is a wireless door sensor that operates on battery power. It features Wi-Fi connectivity and an operating sound rating of 105 dB, making it suitable for both indoor and outdoor use. This model is compatible with Windows and offers smart home integration via Wi-Fi. With its white colour and sleek design, this door sensor is a reliable choice for ensuring security in any home or office setting.