Aroma AG-15A 15W Rechargeable Amplifier for Acoustic Guitar 

The Aroma AG-15A Acoustic Guitar Amp features 15 watts of power, perfect for practice, street performance, karaoke, band performance, outdoor playing, and a variety of other activities where you require a portable acoustic guitar amp. Rechargeable via 5V USB, the AGA-15A also features Bluetooth functionality, an ultra-efficient Class D Amplifier, and powerful energy storage via a lithium battery, in a compact size that's easy to carry.