1. Material: metal
2. Input type: LINE IN (O IN)
3. Output type: LINE OUT (O OUT)
4. Built-in battery: None
5. Recommended headphone impedance: 65-80 ohms (MAX)
6. Type: mini amplifier
7. Power adapter: US standard
8. Ultra-compact stereo headphone amplifier for studio and stage applications.
9. 8 headphone output channels and 1 input channel
10. The volume of each output channel can be controlled independently
11. Ultra-low noise 4580 operational amplifier with excellent performance
12. Comes with DC 12V power adapter
13. Product size: approximately 19.6x5.7x3.1cm
14. Product weight: 350g

Packing list:
Amplifier x 1
Power adapter x 1
English manual x 1
Only the above package contents, other products are not included
Note: different lighting and monitors may cause the color of the item in the picture to be slightly different from the actual item, measurement tolerance is +/- 1- 3cm