Ad-300k is a high-performance digital stereo reverberation and multi-purpose karaoke power amplifier. The parameters include the effect volume, delay time, EQ, etc. at the same time, it supports high-quality music such as USB flash disk and TF card. It supports mobile phone app control and is easy to operate. It is specially designed according to the market demand and can be used in various forms of singing environment. As a top 10 audio brand in China, Tonewinner has 30+ years experience in designing and manufacturing acoustic products. As an original supplier, Tonewinner always warmly welcomes distributors, partners and customers around the world.