BRZHIFI STK443 Class AB Power Amplifier HIFI Thick Film Power Amp 25Wx2 Dual Meter Description: This machine is designed for listening to music on home computers, and it is easy to use with portable devices which with Bluetooth function. The casing of the whole machine is made of CNC all-aluminum alloy, and the retro warm-light dual meter adds a touch of atmosphere to music listening. The appearance of the whole machine is exquisite and compact, convenient for placing on the computer desktop. Specification: Working method: Class AB Quiescent current: 60mA Output power: 25W+25W/8? , distortion 0.3% Frequency response: 20Hz to 50KHz Dynamic range: >100 dB Machine size: 26082193mm Machine weight: 4.6kg Package List: 1 x Power Amplifier. Usually it cost about 35USD-50USD. Thanks for your understanding. If you receive defective item, please kindly notify us within 14 days.