The De Rosa 3 watt travel amplifier one of our smallest and move convenient amps! It features the two basic controls: Gain and Volume. This awesome little guy comes at an amazing price at top notch quality and makes practice sessions really fun! It is perfect for beginners, students, as well as teachers who want to play for their students when they visit without having to lug around a big heavy amp. Powered by a 9V battery so it is made to be taken around and can be used practically anywhere! This is truly the perfect accessory for learning and teaching musicians!