Up2Stream Amp Sub allows you to turn your passive subwoofer into a wireless subwoofer. Pair with any other Arylic stereo system and you can pass the deep bass wirelessly. Enjoy the powerful bass anywhere you want! Hear and feel powerful 100 Watts of booming bass with an adjustable crossover frequency range of 10Hz - 300Hz. You can place your subwoofer anywhere in your house and wirelessly stream deep bass throughout . There is on how many subwoofers you can add to the system. Wirelessly group multiple Up2Stream Amp Sub units with any Arylic stereo device when you need exceptional bass, or just use one when you listen to relaxing music. You have the control. Get a passive subwoofer and you can easily turn your existing stereo system into a 2.1 channel system to enjoy music with powerful booming bass. Connectivity: 2.4G WiFi Power Input: 12-24V DC-in, 12-24V 2 Pin Connector Audio Input: Analog 3.5mm jack Audio Output: Analog Speaker Out (Pin Space 5.0mm) Frequency Response: 10Hz to 300Hz Speaker Power: 100W@2 load at 24V, 60W@4 load at 24V, 30W@8 load at 24V +N: 0.1% @100Hz 1W Speaker Impedance: 28 Dimension: 84x84x17.5mm The circuit board printing is slightly different, which does not affect the use. Colour:As Shown Material:PC Package Contents: 1 x Up2Stream Amp Sub Board 2 x Knob Cover 1 x Screw Driver 1 x Antenna 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.