Guitar Mini Speaker 1. 4 and 3.5mm interfaces. 2 ... 0.cm 3. support MP3 play. SpecificationsGuitar Mini Speaker1. Guitar Mini Speaker With TF Slot 2. Stereo sound quality, ... used with mobile phone, all device with 3.5mm4. Guitar style, can hang in the sitting room, multimedia speakers ... to enter an external audio source (such as radios, MP3 players, computers, etc), to amplify, as a power amplifier using ...