General description Digital technology and single molectron construction ensure that this 2X AC 220V Red Metal Motor Driven Air Siren Horn Alarm delivers steady and reliable performance. It features a built-in LID display for sound amplification, compact size, and produces a powerful sound. Technical specifications Voltage: AC 220V Measurement allowed error: +/- 1-3 cm Other information Package Content: 2 x Mini Motor Siren Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product. No instructions attached; ensure you are familiar with installation and connection methods before purchasing. For use in the US, a voltage transformer is required (not included) to ensure proper functionality.