Popular Aluminum Black Mini Hi-Fi 2.1 Amplifier Booster Radio MP3 Stereo for Car MotorcycleDescription��o Voltage: 12V Material: lightweight aluminum Dimensions: 15.4 x 12.9x 3.9cm Input impedance: 47K Speaker Impedance: 2-8|? Total harmonic distortion: <0.4% SNR: > 80dB Frequency response: 20Hz-20KHz Color:BlackFeatures��o1. With overload， short circuit， overheat protection.2. With treble， bass， volume adjustment control， heavy whispered independent volume control.3. Switch control， with the power lights and signal lights.4. Model input form: RCA， 3.5MP3 socketPackage Included:1 x Hi-Fi Stereo AmplifierNotice:1.The color difference is hard to avoid in the internet sales. Generally we will adjust the colors as the same as the items，but there might be a little color difference according to different light，different monitor.2.Item will be shipped out within 1- 2business days upon your payment completed (Excluding Weekends and Public Holidays).n(*��R��?��Q*)n