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Plain device consist of:
* RNS Neurostimulator, which is a responsive electrical stimulation medical device (battery powered and microprocessor controlled) <ref name="NeuropaceSystemUserManual"/> Responsive electrical stimulation is a new approach to treat epilepsy and RNS System is the first device to provide it. <ref name="epilepsyResponsiveNeurostimulation>SIRVEN, J.I. Responsive Neurostimulation. Epilepsy Foundation [online]. 2014, May. Available online at: http://www.epilepsy.com/learn/treating-seizures-and-epilepsy/devices/responsive-neurostimulation (Retrieved 4.11.2016)</ref> RNS Neurostimulator indicates and records certain patterns in the brain (electrocoticographic, ECoG patterns), which causes seizures. Then delivers short trains of current pulses through the leads to interrupt those patterns. Each stimulation can contain two bursts. Neurstimulator must be implanted in the skull together with leads.<ref name="NeuropaceSystemUserManual"/> The Neurostimulator should work for about 2 to 3.5 years, before battery power is drained. It is size of 28 x 60 mm, so it is relatively small device.<ref name="NeuropaceSystemPatientManual">NeuroPace. NeuroPace® RNS® SystemPatient Manual. NeuroPace, Inc [online]. © 2016. Available online at: http://www.accessdata.fda.gov/cdrh_docs/pdf10/P100026C.pdf (Retrieved 4.11.2016</ref>
* NeuroPace Leads are placed in the brain and are connected to Neurostimulator. One lead contains four electrodes. There are two kind of these leads. First, the Cortical Strip Leads are intended to subdural implant and are available in 15, 25 or 35 centimetres length. Four electrodes in leads are spaced 10 millimetres apart from each other. Second, the Depth Leads are intended for implant into brain. They are in four combinations - 30 centimetre length, 10 millimetre electrode spacing; 30 centimetre length, 3.5 millimetre electrode spacing; 44 centimetre length, 10 millimetre electrode spacing or 44 centimetre length, 3.5 millimetre electrode spacing.<ref name="NeuropaceSystemUserManual"/>
