Description LONG RANGE 850: Long distance baby monitor keeps an eye on your child from anywhere in your home (and can even work a short distance outside). Dependable 2.4 GHZ wireless frequency is more reliable than cameras that work with home WiFi SCREEN SLEEP MODE: Enable VOX mode and the digital screen will sleep while no sound signals detected. No unwanted screen glow when monitoring camaras from your bedroom nightstand. Set alarm in monitors settings for nap wakeup TEMPERATURE MONITORING: Thermometer in the cam top measures the crib or room temperature. Make sure your babies are comfortable in summer or winter. Built in baby monitor night vision system will activate when optics sense low light INTERCOM TALK THROUGH: Press and hold monitor baby camera audio button to say hello or remotely comfort your child. Two way walkie talkie mode will call and allow double talking from the speaker. Nursery camera radio button works lullaby music 24 HOUR BATTERY LIFE: Night vision baby monitor battery is designed to be operated the entire day. Use the cordless monitor travel clip for best access during the day and charge the twin infant monitor at your bedside at night