Brand Name: LUSYA Built-in Battery: Yes Recommended Headphone Maximum Impedance: 32-50 Ohm Output Type: LINE OUT (AUDIO OUT) Input Type: LINE IN (AUDIO IN) DSD (Direct Stream Digital): Yes Body Material: Aluminum Channels: 2 (2.0) Output Power: 180mw Model Number: S3 Operational Amplifier Chips Model: OPA1612 JFET Signal To Noise Ratio: 96 PCM: No Bluetooth: No DAC Model: AK4497 Type: Mini Amplifier WIFI: No