Specifications:Product Model: SM43CClarity: 640*480pTransmission mode: point-to-point wireless transmission (short-range transmission)transmission distance: about 250 meters view distance/50 meter indoorintercom mode: two-way intercommusic: built-in music, volume can be adjustedScreen size: 4.3 inch high-definition LCD screendetection mode: voice activated power saving modebattery: built-in 2100mah tent battery (display only)monitoring: indoor temperature displayLanguage: Icon Shapefunction: horizontal 355 vertical 120 rotationnight vision: infrared night vision about 5 metersFunctions:2X Digital Zoom4X Digital Zoom function, allow parents to have a closer view to see clearly what happened with their baby. Check and make sure to see the baby breathing, rollover, and other delicate movements in the baby's room.Four Cameras for four Rooms (should purchase for extra 3 camera)A vivid 4.3" Screen easily sees every detail of babies. The SPLIT-SCREEN function allows seeing both cameras or babies side by side on the same screen. From delicate movements to the softest breathing, always know whats going on in your babys room!Power Saving Mode/ VOX/ECO MODESwitch on " Power Saving Model" means the VOX/ECO indicator is on. The screen will be turned off automatically when the baby sleeping. Once the camera detects a babys vitals such as coughing and breathing or hears a crying toddler, the screen turns on automatically and wakes you up during deep sleep.Automatic Night VisonDesigned with invisible IR LEDs and high sensitivity sensor, which automatically switches to day or night mode. The camera will turn on infrared LEDs automatically when the light dims. You can see your baby clearly even in the dark without disturbance.Lullabies SootheWhen the baby needs to sleep or wake up because of a nightmare, the built-in lullaby can quickly soothe the baby before the parents have reached the baby. Let your baby fall asleep peacefully with a soothing lullaby.No Privacy LeakMamalink baby monitor didn't need to use an App or WIFI to control the camera. Greatly protects the privacy of the family.Product List: 1x Receiver1x Transmitter2x Power Adapter1x Manual1x Wall Mounting Screw1x Screw Rubber Plug