The HSTM01 provides a superior degree of safety and comfort when using the Biopac Student Lab Stimulator for human stimulation. The ergonomic design allows the user to focus on the electrode placement instead of worrying about holding the electrode. Subjects depress the red safety switch to allow the software-controlled stimulus presentation through. To stop the stimulus, they simply remove their thumb from the switch and the electrode shuts off. The electrode terminates in a BNC connector that interfaces with the BSLSTM Stimulator. HSTM01 Specifications Safety Switch: Yes Lead Length: 3 Meters Connector Type: BNC Interface: BSLSTM Isolation Voltage: 1500 Vrms Isolation Capacitance: 120pF The maximum available energy from the HSTM01 stimulus isolator is limited to be considerably less than the 300mJ maximum as specified by IEC 601-2-10. HSTM01 Handheld Human-safe Stimulation Electrode (BSL, for Stimulator) HSTM01$195.00 Same Day Shipping - orders with UPS Red or Blue shipping will be shipped the same day if received by 3 p.m. PT (Monday-Friday).