Description: 1.100% Brand new and high quality. 2.It is durable and convenient. 3.Simple user instruction and easy to use. 4.It can replace you pickup truck, Van, Boat air horn. Specification: Color:Red Size(approx.):91.6mm\/3.6”(L) x 109.9mm\/4.32”(W) x 150mm\/5.9”(H) (Detail size as shown in the picture) Material:Plastic and metal Voltage:DC 12V Relay Voltage:DC 12V(30A) Fundamental frequency:530Hz±5% Sound pressure level at 2m:\u2267115dB(A) Sound pressure level at 4In:\u2267139dB(A) Reliability:100,000 on\/off cycle Type of sound:harmonized twin tone Package Included: 1x Hore 1x Relay Some install fittings Note:Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)