Description : High power output , mono power 420W . good inductance of large magnetic and copper core winding finite AC current , good performance . Small digital amplifier chip , which highlights the advantages of digital chip . Distortion is significantly reduced , giving you a great hearing enjoyment . Includes left and right channels . Suitable for mobile phone , computer , home theater or DIY audio , with good performance , excellent chips . Specification : Product Type : XH - M252 Power amplifier chip : TDA8954TH dual chip Input voltage : Recommended AC dual 24V ( up to 30V ) Power amplifier : 2x420W Number of channels : left and right channels Output impedance : 2 - 8ohm Size Chart : Size : 107x93x30mm / 4 . 21x3 . 66x1 . 18inch Product Net Weight : About 240g Package Includes : 1 Piece TDA8954TH Audio Amplifier Board Note : Color might be slightly different due to the color calibration of each individual monitor . Please allow slightly measuring deviation due to manual measurement .