... Screen - 3.5 inch TFT LCD monitor - On Screen Indicators - Monitor State, Lock/Unlock, Talk, Take a Picture, ... transmitting range - approx. 250 meters (ideal conditions) - Onboard Buttons/Indicators - Unlock Door, View Monitor. Talk Button, MIC, LED Indicator, ... receiving range - approx. 250 meters (ideal conditions) - Onboard Buttons/Indicators - Call Button, 6 LED Lights. MIC, Speaker, LED Indicator ...