Concealed Single Mini Air Horn
The horn comes with a compressor, air tubing, fittings, and hardware. 
Features:
Air compressor dimensions: 2-5/8"Dia x 5"L
Maximum current draw is 20 amps at 12 volts
Fundamental frequency: 630±15 Hz
Internal space requirements: 13" H x 5" W x 3-3/4" D
*Note: Grill is sold separately.