Brand Name: Nvarcher Built-in Battery: No Recommended Headphone Maximum Impedance: 65-80 Ohm Output Type: LINE OUT (AUDIO OUT) Origin: CN(Origin) Input Type: LINE IN (AUDIO IN) DSD (Direct Stream Digital): No Body Material: Aluminum Package: No Channels: 1 Dimensions (WxHxD): 100*31.5*10mm Signal To Noise Ratio: 84db PCM: No Bluetooth: No Type: Mini Amplifier WIFI: No