Security Monitors & Recorders Differences of camera between Model 612 and Model 812 Only Viewable by You None Internet or Wi-Fi Required No internet connection means the video and audio signal only transmits to ONLY ONE monitor unit. No one else can hack in. The closed-loop system provides you with a secure and private. Two-Way Voice Intercom You can talk with your baby in another room. Enhanced Automatic Night Vision TCome with auto invisible infrared light & power indicator at night. Carefully protect your baby's eyes in darkness, and help your baby to take a sweet dream. Digital Zoom 3X It comes with a feature of 3x digital zoom capability. Night Shift Brightness Set the brightness to the lowest level to get in Night Shift Brightness. It can alleviate interfering sleep after viewing the monitor at night. More Personalization Options You can set it up to match your personalized requirements better than our previous models. For example: the option for the camera indicator switch, adjustable intercom volume, etc. Temperature Monitoring With built-in thermometer, the camera can keep monitoring indoor temperature around the camera, and show on monitor. Multiple Languages Supported Long Standby Duration in VOX Mode In VOX mode, the battery duration can be up to 24 hours. Kindly Note >>>>> There is NO battery inside of the camera , so the camera always needs to be connected with a power adapter while running. The parent unit has a battery inside. It can operate with the battery or a power adapter. [ BM612 Model ] [ BM812 Model ]