-LONG WIRELESS RANGE:180° Field of View & 720p Full HD, full HD live stream of everything at your doorstep in 180° fish-eye perspective, and with the night-vision sensitivity settings, you will always obtain the perfect picture at night for up to 16ft away. REAL-TIME HD VIDEO AND TWO-WAY AUDIO: See every detail of your front door in HD video whenever you want. Talk to your visitor or scare off unknown suspicious person even when you are not home. INSTANT ALERT: Receive an instant alert when someone pressed your doorbell or triggered the motion detection. See, hear and speak to your visitors from your smartphone or tablets, or choose to play a pre-recorded voice message if you are unavailable. INFRARED NIGHT VISION: Protect your home day and night with infrared night vision. Keep home safe after dark. EASY TO INSTALL:Easy installation kit with detailed instruction, Installation can be done within 10 to 20 mins.(Use the existed holes for Doorbell).