DIY easy to install
Able to view, talk and unlock the main entrance  from any room in yourhouse
Portable size to carry
2.4GHZ wireless video intercom and surveillance
Portable handfree video color monitor
Intelligent remote unlock for visitors/guest
Rechargeable battery via mini-USB interface, standby status for 72 hours.
Able to intercom between each portable monitor
300m transmission distance (without blocks)
Full duplex audio mode
2.4 FT-LCD portable indoor  monitor
IR camera
Able to expand to 2 portable monitor with 2 of doorstation camera
12 selectable ring tones