Wrist Pulse Oximeter Accessories CONTEC CMS50F Wrist pulse oximeter broke down because the battery is dead. If you can replace the battery this device will work to monitor your SpO2 level and Heart Rate or Pulse Rate instantly anytime you want. It can be used for sleep apnea, COPD or any other sleep disorder. You can also do the “overnight pulse oximetry test” to understand the severity of your sleep disorder every now and then. I am now selling the individual parts. Wrist Pulse Oximter (with dead battery) = $20 Sensor Probe = $30 USB Cable = $20 Power Adapter = $10 User Manual = $5