Vtech DM112-2 Baby Monitor Digital Audio with 2 Parent UnitsAbout the product: DECT 6. 0 provides crystal clear transmission, eliminating the annoying white noise you hear from analog monitors Parent units need two AAA alkaline batteries (not included) 5 level sound indicator graphic bars on the parent unit indicate the level of sound in your baby's room so you can visually monitor the noise level with the unit muted Belt clip clip the parent unit to your belt and take advantage of the extended range and