Main Features:- Lepy LP2020A amplifier chip provides efficient, powerful sound- Multiple audio inputs- Compact size and lightweight, sturdy aluminum alloy enclosure- Low distortion, acoustically accurate reproduction of music. Ideal for both home and car audio applications- Built-in loudspeaker protection: When the amplifier is turned on to protect speakers from high volume bursts of audio- Over-voltage protection: The interior circuit will automatically shut down when the input voltage exceeds 14.4V DC- Input power: DC 12 - 13.5V- Output power: 20W x 2 RMS- Speaker impedance: 4 - 8 ohms- Frequency response: 20Hz - 20KHz- Minimum THD: Less than 0.4 percent- SNR: More than 80dB- Input sensitivity: 200mV- Input impedance: 47K ohms Channels: 1 Package weight: 0.566 kg Product Size(L x W x H): 14.00 x 11.50 x 4.00 cm / 5.51 x 4.53 x 1.57 inches Package Size(L x W x H): 25.50 x 14.50 x 5.50 cm / 10.04 x 5.71 x 2.17 inches Package Contents: 1 x Lepy LP - 2020A HiFi Amplifier, 1 x English User Manual, 1 x Power Adapter