Feature: 1. Better Driving: Can drive most passive speakers, passive and active sub woofers, also enables better control on volume and frequency. 2. Good Amplifier: This stereo amplifier is equipped with bluetooth 5.0, which can easily connect to both wired and wireless microphone. 3. Broad Matching: Perfectly compatible with phone, MP3, TV, CD player, laptop, desktop and so on to satisfy your needs for audio system. 4. Various Styles: Allows for independent adjustment on treble, middle and bass, ensuring good sound quality as well as various styles. 5. Pretty Designs: Using premium black aluminium alloy casing, the digital reverberator with small size is an excellent home decoration. Specification: Item Type: Digital Reverberator Working Voltage: DC 12v Audio Input and Output: 3.5mm Stereo Microphone Interface: 6.5mm. Package List: 1 x Digital Reverberator1 x Antenna