Power Upgrade: This AK45 Pro audio amplifier receiver has a chip upgrade compared to our previous AK45 audio amplifier, the rated power is upgraded to 50W x2, which can support higher power output devices, such as speakers, CD players and so on. Let you enjoy high quality audio experience Powerful Sound and Compact Size: This audio amplifier offers a maximum power of 820W (410W + 410W) and RMS 50W + 50W for multi-speaker 4-16 ohm impedance, allowing you to enjoy high-performance speakers or components. It has roaring bass and crisp highs. Its compact design fits easily into a bookshelf or desktop. Perfect for small flats, bedrooms, small offices, basements and garages! Multi Input Multi-Purpose: This audio amplifier has Bluetooth, , MIC, SD, USB inputs; audio from external devices such as CDs, , , PCs, computers, tablets, laptops, phones, MP3s and projectors with AV audio. Recommended for home TV audio, computer audio system-gaming, car audio system Bluetooth 5.0 & Remote Control: This stereo amplifier supports wireless Bluetooth 5.0, turn on the device to connect directly with smartphones, tablets and other Bluetooth devices, it comes with a remote control which allows you to change the audio settings from a distance, making you less tired and more comfortable. Using the bass and treble control knobs, you can set the desired music output as you wish. The bright digital LED display makes it easy to see the settings you've changed! Bass and Treble Controls: 2.0-channel stereo amplifier with microphone volume, bass, treble, and master volume control knobs for finer adjustments to sound effects is fun and playable. Name:Audio Amplifier Model:AK45 Pro Audio Channel:2.0 Rated Power: 50W+50W Maximum output power:820W (410W + 410W) Bluetooth: 5.0 Support: Treble / Bass / Microphone Volume Adjustable Remote Control Batteries: 2 x AAA batteries(not included) Signal-to-noise ratio: 85db Distortion rate: 0.5 per cent Rated Frequency: 20Hz-20KHz Input Options: BT/USB/SD//MIC Output Options: Wired Passive Speaker Speaker Impedance: 4-16 Ohm u-disk file format: MP3/WMA/APE/FLAC/WAV FM Frequency: 87.5-108 MHz Total Weight: 0.92kg/2.03lbs Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC100-240V Color:Black Material:plastic Package Contents: 1 * Digital Amplifier set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.