... MP3 play. SpecificationsGuitar Mini Speaker1. Guitar Mini Speaker With TF Slot 2. Stereo sound quality, bass, alto ... sound.3. It can be used with mobile phone, all device with 3.5mm4. Guitar style, can hang ... . Status LED: power on, the switch has a green led is lit on the top left, ... an external audio source (such as radios, MP3 players, computers, etc), to amplify, as a power amplifier using; note: ...