Outdoor solar Wi-Fi sirens feature solar-powered, wireless operation, providing a loud audio alarm and bright light for deterrence. Key characteristics include weatherproofing (often IP67) for outdoor durability, an integrated or add-on motion sensor (PIR) for triggering alarms, and Wi-Fi connectivity for app-based control and notifications. These systems often include high-decibel speakers, flashing lights, tamper protection, and various working modes.