Features: 300DB Train Horn for Your TruckOur 300DB(2*150DB) Train Horn offers the loudest sound on the market, while also being the most compact Train Horn offered. Dual tone loudlyThe internal reflux design, up to 300DB loudness, gives you a loud voice to warn others, and provides a certain degree of safety for driving. Our 12V snail horn can help you reduce unnecessary injuries. Innovative Design: Our Horn features an extremely powerful directly injected mini-compressor 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, passenger cars, boats and motorcycles. Waterproof MaterialABS polymer material, strong corrosion resistance,waterproof product,It won t get rusty and circuit short when it is raining. Description: 1.Compact Design. 2.300DB Sound Volume, The Most Powerful on The Market! 3.Loud, Clear and Deep Train-Like Sound. 4.Simple Installation. 5.Complete Water and Weather Resistance. Specification: - Voltage: 12V - Frequency: low 410HZ high 510HZ - Hz Sound level: 300 dB - Power: approx. 48 W Package includes: 2 X Horns 2 x Sheet Iron 2 x Screw Hat