... of ordinary.3. Several power supply manners including: Battery, computer USB, adaptor DC-5V allow you to enjoy the charm of ... noise ratio of power amplifier:?80DbMagnetic resistant: 4 OhmsPower supply: USB power supply availableColor: Silver, Pink, Blue, Green and BlackNotice:If ... there is bad signal for FM radio? Connect the USB Audio cable as the Antenna to pick up FM radio ...