pre-gelled electrode with CE and FDA certificate. don't cause electrical interferences when connect to patients  

 The medical needle electrode is mainly used by medical practitioners to collect bio-electric signals (EE, EC and EM) from corresponding parts of human bodies during clinic diagnosis, examination, treatment and surgical operations and transmit such signals to nerve monitors, electro-encephalograph (EEG), electrocardiograph (ECG), electromyogram (EMG) for processing, analysis and diagnosis. Also the subdermal needle electrodes can be used to transmit low-frequency pulse wave sent by the low frequency therapeutic apparatus to the subcutaneous tissues of patients so as to stimulate peripheral nerves, excite and pace potentials of palsied peripheral nerves of patients

needle electrode