The Donner Bluetooth 5.0 Stereo Audio Amplifier Receiver, 4 Channel, 440W Peak Product Details High-power independent control: Its peak power can set of to 440W?110W x 4?,and has four channels which is independently controlled.440W is enough to support 4 groups of 8 speakers with 4-8 ohms and peak power within 50W. Bluetooth 5.0: The integrated hybrid amplifier is equipped with the new updated 5.0 bluetooth.It will increase the stability, sound quality and use distance.It Works with latest devices including smartphone, tablet, laptop, computer, etc. Multiple input modes: In addition to the Bluetooth function, the amplifer can also be connected to SD card, USB disk, RCA input and ECHO microphone input.And supports treble and bass adjustment and microphone volume control FM function:With automatic search function, you can save up to 50 radio stations. Detailed operating instructions can be found in the manual or contact our customer staff. HD SCREEN: The integrated receiver for home stereo has a built in LED display. FM antenna and remote control are included in the stereo amplifier package for distant audio adjustments. [Notice] The product needs to be connected to passive speakers to play audio. When there is no speaker connected, there will be a certain amount of wind noise, which is normal Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.