Features: 15W portable acoustic kalimba/guitar amplifier with 5" speaker, professional top quality kalimba/guitar sound output. Equipped with BT wireless music play link and microphone input functions, you can enjoy the fun of listening and singing. Built-in rechargeable battery, no need of external power supply, enjoy your music anytime anywhere. Supports guitar volume, bass and treble control, as well as microphone volume and echo adjustment, giving you different sound effects. With a strap for carrying the guitar amplifier conveniently by your hand.