The batavia peephole is an innovative home security device which allows you to check who is at your door without revealing that you are there the system uses a small digital lense which is placed over the keyhole of doors between 38 and 64 mm thick and provides an image back to a 32 inch lcd colour screen the device is ideal for overnight security private homes and receiving zones features works on doors with a thickness between 38 and 64 mm 160 wide angle mirror large 32 inch c