On Call Chosen Control Solution 3 bottles (2 mL/bottle).
The On Call® Chosen Glucose Control Solution contains a known concentration of glucose. You can use it for both the On Call® Chosen Glucose meter and the On Call® GK Dual meter.
It is used to confirm that your Chosen Glucose Test Strips and the meter are working together properly and that you are performing the test correctly.
Three levels of control solution are available labeled Control Solution 0, Control Solution 1 and Control Solution 2. Control Solution 1 works for almost all self-testing needs. If you think your meter or strips may not be working correctly, you may also want to do a level 0 or level 2 test.
Follow the user manual insert for complete instructions on how to use the control solution