Sutter Instruments BV-10M Electrode Resistance Meter designed to complement the BV-10 electrode beveler (not included). Resistance is indicated by a precision analog meter, which allows the user to easily identify changes in microelectrode resistance while beveling. Please Note: Meters are calibrated using the active lead that originally shipped with the meter. Use of another cable, even if it is from another BV-10M, may require recalibration to produce an accurate reading so calibration may be required.