The MALLORY SONALERT part SCH628AR is a reliable and versatile audio signaling device designed for a variety of applications. This panel-mounting unit operates on 6VDC/6VAC and 28VDC/28VAC power sources, consuming just 23mA of current. Emitting a loud 76dBA sound output in the 2400Hz to 3400Hz frequency range, this Sonalert is perfect for alerting users in noisy environments. Easy to install with screw terminals and available in bulk quantities, the SCH628AR is a cost-effective solution for your auditory signaling needs.