<p>[Product parameters]: 4 Euro 2x5W</p> <p>[Power interface]: Micro-5p (reserved 2.5mm welding port)</p> <p>[Input voltage]: 3.7V-5V</p> <p>[Amplifier working mode]: switchable class AB and class D</p> <p>[Signal to noise ratio]: 90DB</p> <p>[+N:-70DB crosstalk]:-86db</p> <p>Colour: Black</p> <p>material: plastic</p> <p>DNR: 91db</p> <p>[Output Interface]:</p> <p>Speaker output port x 2 groups (one group for left and right channels), it is recommended to ohm 5W-50W power speakers to use</p> <p>Users can freely switch between CLASS AB or CLASS D working modes according to sound preference and power collocation.</p> <p>[Features]:</p> <p>The power switch and the volume knob are integrated. When the sound is adjusted to the minimum, turn it counterclockwise. When you hear a clicking sound, it is turned off. Turn clockwise to turn it on.</p> <p>Powered by Micro-5p interface, ordinary mobile phone charger 5V2A charging cable can be used.</p> <p>[Product Usage]:</p> <p>Can connect the audio signal of mobile phone, laptop and tablet to the output of stereo power amplifier through 3.5mm audio cable</p> <p>Package Contents:</p> <p>1 x Amplifier Board</p> <p>1 x USB Cable</p> <p>1 x Audio Cable</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light 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.</p>