[EASY INSTALLATION] - Simple and convenient setup with direct 12V power supply, no batteries needed. [LOUD & CLEAR] - 90 decibels volume with clear ringtones to promptly notify you of guests. [VERSATILE USE] - Suitable for all access control systems, ensuring security for your home or office. [ATTRACTIVE DESIGN] - Exquisite appearance adds a touch of elegance to your entryway. [STABLE PERFORMANCE] - Reliable doorbell chime that delivers consistent functionality., Manufacturer: Jelquix