Video intercom with monitor function, with instruction manual. - Brand: Panasonic - Model Name: VL-SG010L - Included items: Instruction manual, AC adapter, mounting parts - Size: The main unit is approximately 15cm x 10cm x 5cm - Functions: Video intercom, monitor function The doorphone (exterior unit) requires 6 AA batteries (sold separately). The monitor (interior unit) is unstable due to low battery. I believe the dedicated nickel-metal hydride battery in image 4 needs to be replaced, but I haven't confirmed this, so I'm offering it at a low price. Thank you for looking. Thank you for viewing.