Brand Name: jakcom Built-in Battery: Yes Recommended Headphone Maximum Impedance: <32 Ohm Output Type: USB Output Type: LINE OUT (AUDIO OUT) Origin: CN(Origin) Input Type: USB Input Type: Bluetooth Body Material: Metal Package: YES Channels: 2 (2.0) Output Power: 3W Model Number: portable earphone Headphone Amplifier PCM: No Bluetooth: Yes Type: Mini Amplifier