The dual-rate digital clock of the “Phonotronica 1” type is designed to switch between different rate counters on dual-rate mono- and tri-phase electric meters according to the time zones specified by the Ministry of Energy.
The dual rate three channel digital clock of the “Phonotronica 2” type is designed to switch between different rate counters on dual-rate mono and three-phase electric meters according to the time zones specified by Ministry of Energy, and control street and park lighting at the same time.