This ultra-small, portable My AMP MP3 speaker has its own subwoofer, allowing you to listen to music High and enjoy yourself. The sound effects of ordinary small MP3 speakers are relatively inexhaustible, but this My AMP MP3 speaker with subwoofer can meet your music requirements. The treble and bass can be adjusted automatically. This kind of music selection is equivalent to an effect device. Even its shape is unusual, heavy texture, a lot of metal materials inside, so that when the bass is very strong, the speaker will not have much vibration, ensuring the sound effect, and looks like a traditional guitar effect It has the same weight and appearance as a physical amplifier, without losing the effect of a traditional guitar amplifier. At the same time, it can also be used as a player to connect your iPod, iPhone, Walkman, MP3 or PSP. With a standard 3.5mm mini jack, it only needs 3 AA batteries to supply power, and can also output through the computer's USB port. The volume adjustment is exactly the same as the actual amplifier, and the operation is simple. You can select the desired music effect by simply turning the button. It is recommended as an external speaker of the computer, and it is possible to provide power with a USB data cable. Frequency range: 200Hz to 20KHz Standard 3.5MM jack product data: Product size: 10 * 12.5 * 9cm Material: ABS + metal color:black Power supply: USB output or 3 AA batteries (this product does not contain, need to buy separately) Large output power: 5W Impedance: 4Ω Frequency band: 200-15,000Hz Sound pressure Sensitivity: 115dB ± 15dB Package Contents: 1 * Speakers 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.