the receiving unit for a surveillance arrangement disclosed herein is highly suitable for identifying a signal among all possible signals received from a determined location . in fact , by the use of the invention , it is possible to identify that the signal has been triggered , for example , by a person in an apartment of a building . such identification may provide additional information decisive in some cases , since such information may be comprised by codes , photographs and names and telephones of the persons associated to the alarm emitter . if the person involved has any health problem or any other problem preventing himself / herself any action , information includes associates codes and names and telephone numbers or persons or institutions to be contacted . in what concerns to a neighborhood , it is possible to use , apart from the personal device for emitting the alarm signal , a radiofrequency emitter ( with the same operating principle of remote controls ) which is activated when a normal open contact is closed or when receiving information engaging it to the alarm of each of the houses in that neighborhood . in case of using a single receiving unit , if one of the alarms is activated , the event will be reflected immediately at the monitoring interphase which , among other data , will show a location map of the house , photographs , names and telephone numbers of associated persons . the advantage , as compared with present monitored alarms using a cell network connection per each house is that , apart from adding monitoring of persons by means of remote controls , the arrangement of the invention only needs one network connection per neighborhood , regardless the amount of houses to be monitored , which drastically reduces network connection costs and complexity of installations as well as maintenance costs . in case distances so require , known radiofrequency repeaters should be installed . the receiving unit for a surveillance arrangement of the invention - a - includes a radiofrequency receiver - 1 - for detecting an electromagnetic wave of a determined frequency emitted by a remote control - 10 - activated by the user under a determined condition . the signal is sent to a processor - 4 -, is decoded , and then may have access to a non - volatile memory - 2 - to verify whether the code received is an active code , i . e . authorized by the service supplier , also verifying whether the receiving unit - a - is active , thus completing the process . the code list in said non - volatile memory - 2 - is updated periodically according to changes made by the service supplier , such as inclusion of new users or discharge of users due to suspension of services , lack of payment , etc . once the code validity and operation of the receiving unit - a - are checked , processor - 4 - activates an outlet connected to a relay - 5 - operating as a connection to any existing system , opening a normal closed contact or closing a normal open contact thus triggering the signal in the corresponding system . simultaneously , processor - 4 - codes and records the event in the database - 8 -, along with the remote control unique number - 10 - and the unique number of receiving unit - a - by means of the network module - 6 - which may be wired , wireless or gprs / eg / 4g to record the event . in locations where there is no network connection or gprs , or where the network has defects or lack of connection , the receiving unit - a - may send information of the event through text messages ( sms ). in these cases , data of remote control - 10 - users may be loaded in the non - volatile memory - 2 - to send complete information of the event in the text message directed to the administrator of such location . this configuration may be also effected upon request from the user , for example , if the user has no network connection at all . interphase - 9 - , having access to the database - 8 -, allows operating in real time thus assuring that the events will be seen by the person in charge of the control of the location from which the event comes from , as well as of the receiving unit - a - and remote controls - 10 -, thus allowing amendments as well as suspensions and admissions . each receiving unit - a - allows by means of audio module - 7 - and network module - 6 -, a two way audio communication started remotely from interphase - 9 - as well as reproduction of a pre - recorded audio message which may be sent and updated at the time of unloading updating of unique codes of remote controls ( 10 ) as well as updating of the state of receiving units - a -. in case a register is to be created , all events may be saved in a removable sd memory - 3 -. in order to avoid copy of the elements as well as preventing hacking , once the mentioned components are introduced in the receiving unit - a -, the radiofrequency receiver - 1 -, processor - 4 -, memory - 2 -, the network module - 6 -, relay - 6 -, audio module - 7 - and removable sd memory - 3 -, a resinous substance is injected sealing the arrangement . when this substance is dry , it is practically impossible to have access to the components . database - 8 - contains information related to remote controls - 10 - distributed among the service users , such as the steps to follow in case of alarm , these guidelines being previously agreed upon by the user and the service supplier . information stored in database - 8 - also includes allocation of identification codes to each of remote controls - 10 - and identification codes of remote controls of associated clients , location of the place where the service is rendered , including an interactive map of the zone , and data of persons to whom each code is related . said database - 8 - may be housed in a web server to which access is possible by means of interphase - 9 - the supplier as well as the user may have access to removable sd memory - 3 -; from there being able to set the connection interval to unload the updated status and the list of unique codes of remote controls - 10 - as well as the period of time during which the pushbutton should be pressed in order that the event be effective , thus avoiding accidents due to mishandling , which could result in false positive events . audio messages previously saved in removable sd memory may be executed or not , as well as the minimum waiting time between unique codes of remote controls - 10 - thus avoiding multiple records for the same event . configuration data may be also entered to have access to the network by active module ethernet , wifi or gprs / 3g / 4g . also , telephone numbers may be included to send the event via sms in case network fails . thus active network module gprs / eg / 4g and telephone numbers are used to send the event via sms in case this operating mode is selected . in this case , the active module should also be gprs / 3g / 4g . remote controls - 10 - based on present technology have a universe of combinations from 2 to 20 which results in 1048576 possible unique codes . the radiofrequency receiver - 1 - in not limited in what concerns to its ability to receive codes with a length of more than 20 bits , therefore , it is compatible with remote controls that may carry out said emissions in the future . further , the universe of possible combinations to generate unique codes of each receiving unit - a - is only limited by the size to be given to the information alphanumerical scope used to send said code to the database - 8 -, thus , with a scope of only 5 digits , possible combinations are over 900 million . in practice , there are no limitations in what concerns to the amount of surveyed locations or the amount of remote controls - 10 - which may be individualized per each location . in an alternative embodiment which may be used separately or as a complement to remote control - 10 - a radiofrequency emitter is used which is activated when a normal open contact is closed or when receiving a supply . said radiofrequency emitter is connected to the alarm of a house and to a receiving unit - a -. if one of the alarms is activated , the event will be immediately reflected in interphase - 9 - which , among other data , will display a map showing the house location , photographs , names and telephone numbers of associated persons , etc . the advantage over present monitored alarms , using a connection to the cell network connection per each house or flat is that , on one side , simultaneously , it may add individual monitoring of people and on the other only requires a network connection per neighborhood , regardless the amount of houses to be monitored . this drastically reduces costs of network connection as well as complexity of installations and maintenance . it is obvious that in case distances are an issue , it will be necessary to install repeaters . it should be understood that the particular embodiments shown and discussed herein are not the only ways in which the invention can exist . they are currently preferred embodiments of the invention . one skilled in the art can readily see other variations that would also fall within the scope of the appended claims .