Pros: cheap works male to male cable included build quality small size Cons: no charging cable / adapter small volume gain volume knob a little shaky Overall a cheap little amplifier that works but you can’t expect a huge volume increase for this price. I tested it with 250 ohm headphones on my tablet and the volume did increase a little which acceptable for this price. Sound quality didn’t change, which is ok. The volume knob seems sturdy but it shakes a little - no big deal. I recommend this for low impedance headphones.

Pros: cheap works male to male cable included build quality small size Cons: no charging cable / adapter small volume gain volume knob a little shaky Overall a cheap little amplifier that works but you can’t expect a huge volume increase for this price. I tested it with 250 ohm headphones on my tablet and the volume did increase a little which acceptable for this price. Sound quality didn’t change, which is ok. The volume knob seems sturdy but it shakes a little - no big deal. I recommend this for low impedance headphones.

Pros: cheap works male to male cable included build quality small size Cons: no charging cable / adapter small volume gain volume knob a little shaky Overall a cheap little amplifier that works but you can’t expect a huge volume increase for this price. I tested it with 250 ohm headphones on my tablet and the volume did increase a little which acceptable for this price. Sound quality didn’t change, which is ok. The volume knob seems sturdy but it shakes a little - no big deal. I recommend this for low impedance headphones.