These air horns include a single 810 hz high tone horn, a 795 hz low tone horn, and all the hardware and tubing that is needed. The sound level for this setup is 118 Db.

The Twin Supertone horns include a single 500hz high tone and a single 300 hz low tone horns and produce a sound level of 118 Db.

This 12v Hella horn has a 500hz high-tone with a sound level of 110 Db.

These affordable OE style disc horns are available for 6 volt & 12 volt systems. The 6 volt horn will work with a 12 volt system and will produce a louder tone than the 12 volt version by doing so, but it will not last as long as it would with a 6 volt system.

This six tone siren is ideal for grabbing the attention of slower vehicles and spectators. The siren is a 20 walt system at 12 volts.

MS4000 mini-sirens provide 100-watt output and meet Class A requirements when
paired with any Federal Signal speaker. This mini-siren can operate from any 12-volt
negative ground vehicle electrical system. It is protected against failure modes,
including reversed polarity, by an easy to replace fuse.

Wail, Yelp, Priority, Manual, and Air Horn are all standard on the MS4000 and are
controlled by rocker switches. The Undercover version features a separate mini toggle switch panel which enables the siren box to be mounted remotely, for using less dash space.

Recommend speaker is Federal's AS124 100W speaker (FSC-750501)

This speaker features a lightweight housing that is exceptionally strong, resistant to heat and moisture. It's versatile design allows the unit to be mounted horizontally or vertically to fit multiple applications. It total power rating is 100W. It's recommended speaker for Federal Signal's MS1000 series mini sirens.

It's Dimensions are:
Height 5.7 in (14.5 cm)
Width 7.7 in (19.6 cm)
Depth 4.7 in (11.9 cm)