Features :
Smartly Work with Smart Home Devices: Just by voice-acvatived command and you will see who's at your front door, how your baby's doing. Allows sharing your camera with up to 10 family members and manage multiple cameras on a single account. 
Truly Wireless Security Camera System:
Smart PIR Motion Detect and Instant Alerts: Digital PIR motion sensor is more sensitive and send almost no false alarms. You will receive instant App push notifications, email alerts and sound alarms (siren) when motion events are detected. Flexibly set up motion sensitivity and working time to avoid false alarms caused by fluttering moths or flying twigs. 
Free Rolling 7-day Cloud Storage: Event videos are securely uploaded to SD card( purchase separately) or Reolink cloud. Free cloud plan provide 1GB cloud storage to record motions triggered for the previous 7 days. Live view and playback multiple cameras via the Reolink app (iOS android) and client(Windows Mac). 
2-Way Talk and 2-Year Warranty: Ensures this will quickly become your favorite no-risk purchase. Listen and talk interactively with your beloved ones, ward off would-be burglars when off-site. Adopted advanced sound coding technology, the wireless camera can intelligent filtering environment noise to realize barrier-free communication.