Internal rechargable battery charged via 5V wall adapter
Gain selector switch
Runtime of > 22 hours per charge
Have you ever bought a headphone or earphone and is not satisfied with the sound? Maybe you want the bass from your headphone more? Maybe what it need is an amplifier to give it the extra sound and bass. Ordnance .22 portable headphone amplifier is the best solution if you want to get the best listening experience with your phone, ipods, mp3 players or laptop/computer. It is rechargeable and small enough to fit in your pockets.