Frequency/speed: the rocking motion will have two speed settings, high and low. For the low setting, the sleep surface must rotate with a frequency of 1.15 Hz ± 0.1 Hz. For the high setting, the sleep surface must rotate with a frequency of 1.65 Hz ± 0.1 Hz. The electronics and programming must allow for these frequencies to be adjusted by Halo via OTA firmware updates.