Brand Name: Dilvpoetry Built-in Battery: Yes Recommended Headphone Maximum Impedance: 251-300 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: Yes Channels: 2 (2.0) Output Power: 125mW Dimensions (WxHxD): 94*52*12mm Model Number: XQ-20 Signal To Noise Ratio: 114 Bluetooth: No Type: Mini Amplifier WIFI: No