See visitors that press your doorbell and talk to them before opening the door this digital system provides clear pictures on a 2 colour screen day or night via the night vision camera if you are not at home this clever system takes a photograph of your visitor so you know who called the doorbell is water resistant and is supplied with a fixing bracket the indoor unit is rechargeable for portable use video monitor is rechargeable battery and charger included camera uses 4 x aa batter