All the standard VTG features are retained, including the facility to select from three volume settings via the PCB mounted DIL switch. This allows individual sounders to be converted to high output devices where additional sound output is required. The use of a third wire enables a second stage alarm to be switched in to override that selected tone.

Standard on all VTG products is a universal locking system. Using an industry standard grub screw, VTG products maybe locked in place, making VTG fully compliant with the latest requirements of British and European standards.

Quick fit installation is achieved by the bayonet fixing arrangement standard on both base variants. The deep mounting base offers ingress protection to IP65 and features a cover plate that is discarded for surface wiring and kept in place when wiring directly through into the rear of the product.