The content is only used to understand the product reference description, please do not quote directly2PCS 300DB Train Horn for Trucks The Loudest Waterproof Loud Air Electric Snail Horn 24v Double Horn Sound for Car Motorcycle 300DB Train Horn for Your Truck Our 300DB(2*150DB) Train Horn offers the loudest sound on the market, while also being the most compact Train Horn offered. Dual tone loudly The internal reflux design, up to 300DB loudne, gives you a loud voice to warn others, and provides a certain degree of safety for driving. Our 24V snail horn can help you reduce unneceary injuries. Innovative Design : Our Horn features an extremely powerful directly injected mini-compreor to really charge and amp up the sound All integrated into one small but powerful device Broad Compatibility : Train Horn is Suitable For Almost Any Vehicle While It's the perfect upgrade for trucks, our horn is also compatible with SUVs, paenger cars, boats and motorcycles. Waterproof Material ABS polymer material, strong corrosion resistance,waterproof product,It won't get rusty and circuit short when it is raining.Product description1.Compact Design.2.300DB Sound Volume, The Most Powerful on The Market3.Loud, Clear and Deep Train-Like Sound.4.Simple Installation.5.Complete Water and Weather Resistance.Specification:Voltage: 24VFrequency: low 410HZ high 510HZHz Sound level: 300 dBPACKAGE INCLUDES:2 X 300 DB Super Train Horn For Trucks2 x Sheet Iron2 x Screw HatNote:1. Due to the difference between different displays or display lighting, our products may have a little color difference.2.Due to manual measurement, please allow an error of 1-3mm.