Videx CVKC8K 1 or 2 Button, Surface or Flush Mounted Colour Video Kit with Keypad. 

The design allows up to a total of 4 entrance doors and up to 4 video handsets per call button. 

Features:

• Adjustable call tone
• Timed mute facility with LED indicators
• 4-8 digit code length
• 1-4 entrances