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 room 4.It is just like a magicmusic box staying with you all the time. 5.what's more the sound is smooth, clear, and crisp with high quality ...