Voiced for heavy metal and grunge sounds, the Fluid Audio Strum Buddy Heavy Metal Edition is a portable guitar amplifier that mounts directly atop your electric guitar, suctioning to the body with its rubber cup. It delivers 6W of power through its 40mm neodymium speaker, and is battery powered for convenient mobility. Its lithium-ion battery is rechargeable via a USB connection with the supplied charging cable, and can last up to 3.5 hours on a single charge. The Strum Buddy boasts a 3.5mm input jack, as well as an included 1/4" to 3.5mm cable for plugging your guitar into the amplifier's jack. Once plugged in, you'll have access to three onboard DSP effects presets, including overdrive, phaser, and reverb. The Strum Buddy provides a portable and efficient way to amplify your electric guitar without being tethered to a traditional amp.