The byron smartwares wdvr740s wireless dvr set is a complete professional camera security set that allows you to easily monitor your property can be used at home but its also very suitable for small offices easy to install just think where you would like to put your cameras install them and they will be automatically linked to the dvr the range of the cameras is a maximum 200 metres in open air depending on the circumstances the range can be different easy to view real time images on your sm