This little white box from India is an electronic Tampura. It runs either from mains or batteries. I got a 10 cm (4") speaker built in. There is a 3,5 mm (1/8") audio out socket named Speaker.
Once you hear it, you will know it's a kind of instant India sound you get.
Here is a recording made via the built in speaker:
The first 10 secs without PA, MA or NI selected. Then 1o secs with PA, then 10 secs with MA and finally 10 secs with NI. So the picture shows what you hear from about 0:10 to about 0:20 of this recording.