2 Way Audio Mixer 3.5Mm Un-Powered Mixer, 2 To 1 Stereo Aux 3.5Mm Line Levels Product Details The X21 is a stereo two channel passive mixer for expanding a console mixer, mixing instruments, cd players, cassette players, computers etc. It requires no batteries or other power source. The unit may also be used as a 1 in 2 out stereo splitter box when all controls are turned completely clockwise 2 Stereo 3.5mm Inputs 1 Stereo 3.5mm Output Package contains: X21 audio mixer x1 Stereo 2 input / 1 output: It can connect 2 audio inputs at the same time. Each track has an independent volume adjustment knob, which can be output by headphone and speaker. The perfect way to listen to music and mix multiple sound sources incl. smart phones, tablets, computers, MP3 players, CD, etc. The unit may also be used as a 1 in 2 out stereo splitter box when all controls are turned completely clockwise Ultra-small mixer: Easy to carry and operate and mix multiple sound sources without limitation and boundary; Plug and play, no power supply required, small size, easy to place, suitable for your desktop and office. Note:This passive product does not need power supply, and there is no internal amplifier circuit compensation, so the output will be attenuated (high impedance load attenuation is small, low impedance load attenuation is large) 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.