In aspects of the present disclosure, an auto turn on blood glucose monitoring unit including a calibration unit integrated with one or more components of an analyte monitoring system is provided. One great advantage provided by the novel seating device is that upward and downward movements can be slightly dampened thereby substantially alleviating the load on the back. An adjustment sleeve is sleeved on the tubular body, and has a depressing section disposed proximate to the clamping jaws, and a threaded section that is formed with an internal screw thread which engages an external screw thread on an outer surface of the tubular body.