This instrument is known as Swar Sudha. This is a 3-in 1 device a Metronome, a Tuner and a Swar Sudha to give you a perfect frequency/ Swar of all the notes (A=440Hz)
a) Metronome - Click the metronome button and a beat will start. To increase/decrease the button press the specified button.
b) Swar Sudha - Select your particular scale and press selector button for Madhyam or Panchyam note of the same scale..