Speaker included.
What's the difference between D1 and D2/Pro?
D1 is 17 key walnut wood kalimba.
D2 is new version 21 key Kalimba Sapele wood.
D2pro 21key kalimba Black Walnut wood has audio chip inside, which can make different kalimba sound when you click the button (light changing).
All tuned in the key of C
