FUNCTION: USB Bluetooth 5.0 RCA SD input, 2.0-channel stereo output, low audio distortion. Hi-Fi sound quality, you will enjoy excellent sound quality. Microphone volume and volume control, treble and bass adjustment. With 2 microphone jacks, you can sing karaoke at home. Equipped with remote control and European plug, easy to operate. U drive and memory card, plug and play. With an FM score. （Improved version of AK-45） digital audio amplifier Fully updated design, rated power 40W 40W, ideal for 4-8-inch passive speakers. Extension of functions, addition of microphone jack. Besides, the sound quality as a digital amplifier receiver is superior than that of ordinary analog amplifiers. With built-in power transmission board, which supports AC 110-240V power input and 12V/5A DC input, ready for use. （HiFi） Stereo Amplifier Receiver 2.0 channel Bluetooth 5.0 digital stereo amplifier receiver can 400Wx2 P.M.P.O (peak music output power). With powerful sound processing chip, distortion ratio: ≤0,5%, signal-to-noise ratio: 85db, strong anti-interference capability, power induction shielding. Rauscharamp amplifier, HiFi sound effects, you can experience an immersive effect. （Multiple inputs and versatility） Mini size with FM function, ideal for indoor/outdoor use, parties, in the car, teaching. （With microphone function） Home audio amplifier receiver with microphone input jack, you can sing karaoke with family or friends at home, amplifier with echo delay and reverb function, you get better sound quality HiFi. In addition, FM-enabled audio amplifier, FM mode can configure more than 20 stations. （Easy to use） Bluetooth audio amplifier compatible with two passive 4-16Ω speakers. Power amplifier with remote control for audio settings, can read SD cards and MP3 players USB, supports BT wireless connection. With European plug for easy operation, perfect for home theater system. （Compatibility） Widely used in indoor and outdoor places such as homes, parties, bars, concerts, carnivals, etc. Specification: Model: AK45 Color: Black Size: 180*138*6.6mm Bluetooth: 5.0(5 meters unobstructed) Input Sensitivity: 500mV Peak power: 300W and 300W Rated Power: 40W and 40W Distortion Ratio: ≤0,5% Signal-to-noise ratio: >85dB Frequency: 20-20KHz Distortion: ≤0,5% Audio input: BT RCA SD USB Channel: 2.0CH Power Range: DC12V/5A, AC 90V-240V, 50-60Hz Package includes: 1x amplifier 1x remote control 1x power cord 1x FM antenna 1x Instructions