The Programmable electronic bagpipes from Ross Technologies can be used either as a practice chanter with earphones or with an amplifier for performances. It be programmed to play with or without drones and in several instrument voices, including Highland pipes, Uilleann pipes, Whistle, Accordian, Bells, Piano, Strings, and Organ. Can be used either as a practice chanter or with an amplifier for performances. It can even be programmed to play in multiple keys, making it easy to play along with other instruments! It will remember your preferred settings and will automatically shut down after a period of inactivity to conserve battery power. Powered by one 9-volt battery.