Stereo Audio Mixer, 4 Channels Stereo Audio Mixer, 4 In 1 Out 3.5Mm Stereo, Product Details [4 In 1 Out] Stereo mixer that mixes four sound inputs into one stereo output. Each potentiometer controls the volume of each channel separately and does not affect each other. [Easy To Control] Stereo sound mixer shell is made of premium metal, sturdy and decent switching device. With the bass and treble controls, you can adjust the settings as needed. [Compatible Devices] 3.5mm stereo mixer input interface compatible with PC, cell phones, laptops, etc. Output compatible with speakers, headphones, bar speakers and more devices. [ Range] 4 in 1 out mixer, direct drive for headphones or connection to amplifier, with 3.5mm stereo socket. With 3.5mm sound cable, providing range transmission of inputs and outputs. [Stable] Working voltage is DC 5V?12V, DC5.5 x 2.1, amplification is about 2x. About 8ma quiescent current, using for NJM3414 low voltage high current op amp. Maximum drive current 70ma, easily drive headphones and external amplifiers. 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.