ITEM NAME:2pcs 12V Car Truck Motorcycle Electric Driven RED Air Raid Siren Horn Alar XNK Descriptio n Specifications: - Material: PVC and Metal - Voltage: 12V - Dimensions: Approx 87*90*82mm - High/Low Tone Frequency: 500 Hz/410 Hz - Sound Level ( 2 Meters): 135 dB - Color: Red (As Pictures Show) - Working pressure: 0.3~0.9MPa - Temperature adaptation range: -40~80`C. - Quantity:One Pair (2pcs) Product list: One Pair (2pcs) Electric Air Horns Note: 1.Please allow a little size error due to manual measurement. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! One Pair (2pcs) Electric Air Horns.Product list: One Pair (2pcs) Electric Air Horns. - Quantity:One Pair (2pcs). One Pair (2pcs) Electric Air Horns. - High/Low Tone Frequency: 500 Hz/410 Hz. - Color: Red (As Pictures Show). We'd like to settle any problem in a friendly manner.