Philips avent scd 57001 features dect technology for enhanced communication secure interference free signal easy to control menu lcd screen vibration alert function recharging cradle voice activation vox two way talk back 18 hour battery eco mode out of range and out of battery warnings 330 meter range temperature sensor philips avent scd570 audio baby monitor is ideal for monitoring your baby day or night the scd570 has an easy to use parent unit thatrsquos ideal for use around t