Philips avent scd570 features dect technology for enhanced communication secure data encrypted signal easy to use menu lcd screen vibration alert recharging station voice activation vox two way communication 18 hour lithium battery eco mode out of range and out of battery warnings 330 meter range zero interference temperature sensor philips avent scd570 baby monitor is designed to give you peace of mind and security when monitoring your baby the avent scd570 uses dect technol