Donner Guitar Headphone Amp Heavy Metal Portable Fx Chorus Rechargeable Mini 1. Provides excellent experience of guitar playing, sound based on Soldano SLO100*.You can also turn on FX Fuction(Chorus) 2. Build-in recharge lithium battery, works for 5 hours after fully charged (USB charge cable included). 3. Very small size and you can put it in your pocket when you go out, plug and play. 4. 1/4" (3.5mm) Aux Input jack lets you play along with your CD/MP3 player. 5. No Risk, 30 Days Unconditional Money Back Guarantee Backed Up By Our Awesome Customer Support, you can rest assured to buy our products.