... Keychain portable speaker 1,Frequency Response: 30HZ-20KHZ 2,Supply Voltage Rejection: 80dB 3,Power: 5V/1A 4,Material: ABS Keychain Portable ... SpeakerFunctions1.Support computer, usb port2.2-piece multimedia speaker system3.Tiny size occupies virtually no ... sound is smooth, clear, and crisp with high quality speaker.6.It's a good choice to place it ...