DC 7.4V / 2000mA Battery Guitar Amp Amplifier for Bluetooth Musical Instrument

Battery: DC7.4V / 2000mA lithium ion battery. Small size, providing the longest battery life, so outdoor singing no longer worry about battery life. Item Type: Guitar Amplifier. The high-efficiency Class D amplifier and strong power battery enable the product to achieve efficient energy use while reducing weight.

eBay