Panasonic Key Features - Wireless Handset : Check visitors and respond promptly from everywher in home and even while you are doing something else, by wireless handset. UP to 4 wierless monitor connectable. Max Wireless rang is 100 m with no obstacles. You can add on repeters expand the range. - Picture Recording Function : The intercom records the images of up to 400.(50 separate sessions : 1 session consists of 8 shots) - 5-inch Wide Screen : Main monitor offer easy viewing at wide angles both vertical and horizontal. - Voice Change Function : This function makes woman's voice (higher keys) sounds like a man's(lower keys). - Intercom Call : Both the main monitor station and the sub monitor station can transfer a door call using the same operation. When using multiple sub monitor stations, you can make intercom calls between the sub monitor stations. - Electric Lock Release Support(Door Opener): The door lock can be easily and quickly released even from the second floor of the house. - Night Vision with LED Light (illumination lamp) : Door Station is equipped with LED Lights (illmination lamp). It Enables the colour display of visitors at a distance of about 50 cm at night.