Edwards 740 and 744 bells with an exposed gong are non-adjustable, and are suitable for use in residential, commercial and OEM applications. They may be operated off of a 591 or 592 transformer or DC power. They are also suitable for AC powered security systems with battery standby.
Also known as
- Commercial Fire Systems: Edwards Signaling Safety Supplies General Purpose Vibra
- Edwards 740 Nubel General Purpose Vibrating Bell 6 - 8 Volt AC/ 3 - 6 Volt DC 1