Package:Yes PCM:No Built-in Battery:No Channels:2 (2.0) Output Power: 1W Recommended Headphone Impedance: 501-600 Ohm Input Type: LINE IN (AUDIO IN) Output Type: LINE OUT (AUDIO OUT) DSD (Direct Stream Digital):No Bluetooth:No Brand Name:IWISTAO Dimensions (WxHxD):320 mm* 180 mm * 160 mm WIFI: No Type: Professional Amplifier Earphone amplifier output: 1W Output impedance of Earphone amplifier:32 ~ 600 ohm Output power of tube amp:2 x 8W (4 ohm) Frequency response: 26-38 KHz +/- 2dB Total harmonic distortion: Less than 0.008% (10Hz to 20 kHz) Signal to Noise Ratio: Greater than 118dB (A weight) Net weight (W*D*H):6.2kg Operating voltage:110 ~ 240V / 50 ~ 60 Hz Output Type:RCA