The Dhruva Nano Zx 4-in-1 is a harmonium-type drone sruti box (sur-peti) that is also a tuner /sruti box / metronome / game. It produces a drone similar to a harmonium type traditional sruti box (sur-peti). It has a Tuner / Pitch-pipe with Digital Display, Dual scale system: Chromatic / diatonic. It has Auto-tuning of SA-PA-SA / SA-MA-SA with LED indication. Pitch adjustable over 1 octave and fine tuning of pitch is available. The Dhruva Nan Zx has an optional Metronome. A new feature in the Dhruva Nano Zx is the tuning game to help improve your tuning skill.
SMPS (Universal voltage facility) for use at any voltage from 90 – 260V AC
Automatic switchover to batteries on power failure
Automatic saving of selected pitch into memory; option of saving one more selection into memory