TECHNICAL PARAMETERS: The reverb board is small, easy to install, possess more stable performance, working voltage from DC 6‑15V WIDE APPLICATION: Microphone reverb board with excellent performance and comprehensive cost performance is widely used in store solicitation, home theater, square speakers and so on EXCELLENT PERFORMANCE: Microphone reverberation module is made with fine workmanship, possess compact appearance and stable performance, can make sure durability and stability WITH MICROPHONE: This product is a microphone reverberation board, which is made by SMD technology LARGE CAPACITY CAPACITOR: The microphone reverb board adopts dual row symmetrical capacitors with large enough capacity and quantity, and the filtering effect is more perfect, which is an important device to improve the power factor