What's in the box:

2pcs 12.0V 220dB Loud Compact Electric Blast Tone Air Horn Kit For Motorcycle Car (Red)

This is for a set of two (2)horns for 12.0V systems. Using a standard blade connector on the back. Application for all types of vehicles.

Features:
These horns use a standard blade connector on the back.
Each horn has a diameter of 125mm (4.9").
Application for most types of vehicles.
Feature of disc-style horn.
High volume.
Easy to install, low power consumption.

Specifications:
Material: metal
Color: black, red (optional)
Voltage: 12.0V
Qty: 2pcs
Loudness: 115dB each
Frequency(High Tone): 40020HZ(High)
Frequency (Low Tone): 33520HZ(Low)
Diameter: 125mm / 4.9in
Weight(1pcs): 357g / 0.78lb
Package size: 140 * 120 * 115mm / 5.5 * 4.7 * 4.5in
Package weight: 780g / 1.72lb

Package List:
2 * Horns