★ Features No need for the original circuit box! → You can enjoy 4 different tones with just the horn unit and this product! Usable in all Arena 1, 2, and 3! ★ 4 Tones Without reverb (Euro sound: PA!) With reverb (Electronic sound: PAAAAN!) 5-note music (La Cucaracha) 6-note music (Godfather) → You can listen to the actual sound here! https://youtu.be/4Ra8j4mxeoU?si=wj9R1maBNeVlTLLd ★ Easy Installation Wiring is the same as the original! Only two more changeover switch wires. High-quality case for long-term use. ★ What you need Arena horn unit (low/high tone) ON-OFF switch x 2 (e.g., Aimon 3203, 3214) 10A fuse (can use the original) Wiring accessories (crimp terminals, etc.) ★ Peace of Mind All products are tested with actual Arena horns! Each unit is re-checked before shipping. Instruction manual (download link) included, so even beginners can rest assured! Made in Japan ABS resin case used (75 x 50 x 30mm) Uses many higher-performance electronic components than the original! ★ Please note Horn unit not included. Continuous use for extended periods can lead to heat generation in the circuit box. Installation and use of this product are at your own risk. ★ About Shipping Usually ships within 3 days May take up to 7 days depending on stock availability. ★ Recommended for those who: Are having trouble because the original circuit box is broken Want to add unique tones and enjoy them Want to further enhance the appeal of the Arena horn If you want to stand out from the crowd with powerful sound, please give it a try!