The Joyo Top-GT amplifier is a small and portable device that combines aBluetooth speaker with a guitar amp. It is ideal for practicing your guitar skills andcan also be used as an ordinary Bluetooth speaker.As a guitar amp, it features VOICE, DRIVE and TONE controls. You can LINK Top-GT with your mobile device and use any guitar app to use its sounds and play them through the Top-GT. You can use the included 3.5 mm link cable to connect the Top-GT to your smart device and enjoy the flexibility of software based amps and effects. (please be advised that some Android and Windows phones need an adapter to reverse the plug’s polarity) Your guitar gets connected with a standard guitar cable.