Check the listing for details. JamStack 1 Portable Attachable Guitar Amp Bundle Bluetooth Preowned with Case. Condition: Used. Listed at 74.95 USD. JamStack 1 Portable Attachable Guitar Amp Bundle Bluetooth Preowned with Case. Comes with everything you see in the photos! This JamStack 1 Portable Attachable Guitar Amp Bundle is perfect for any musician who wants to take their performance to the next level. With Bluetooth connectivity, this amp can easily connect to your electric guitar and provide you with a powerful sound that will blow your mind away. The bundle includes everything you need to get started, including a case to protect your equipment. The JamStack 1 is a portable amplifier that is designed to be attached to your guitar, making it easy to play anywhere. With one speaker and a powerful sound, this amp is perfect for small to medium-sized venues. The product line includes a variety of features that make it suitable for any musician, regardless of their skill level. This bundle is a must-have for anyone who wants to take their guitar playing to the next level.