Brand: My AMPProduct size: 10 * 12.5 * 9cmMaterial: ABS + metalPower: USB output or 3 AA batteries (This product does not contain、 sold separately)Maximum output power: 5WImpedance: 4¦¸Frequency band: 200-15、000HzSound Pressure Sensitivity: 115dB ¡À 15dBCommodity content: body ¡Á 1; 3.5mm audio input / output line ¡Á 1; USB cable ¡Á 1¡¾Features¡¿It can be used as laptop computers、 MP3 players、 speakers and even substandard、 low power consumption of only 5 watts.Replica amplifier design details kind、 is simply a full-size copy.You can manually adjust the bass effect、 through knob to select your favorite music the best results.Power: You can use the USB data cable to the computer power supply、 or the use of section 35 battery-powered (not included)Frequency range of 200Hz to 20KHz frequencyStandard 3.5mm jack can be used as computer speakers.