Two colours: Choose from grey and silver. Two-way intercom: Features a built-in microphone and intercom speaker which allows for two-way audio communication for speaking to visitors. App notifications: A smart PIR motion sensor responds whenever any motion is detected and automatically sends an alert to your smartphone. Video: HD 1080p video with 166° panoramic wide viewing angle and infrared night vision mode. Home security: Get a smart wireless video doorbell. Long battery life: Enjoy up to six months battery life when fully charged using rechargeable 18650 batteries. Smart Wireless Video Doorbell | Grey | Living Social