The On Call® Extra Blood Glucose Monitoring System offers user friendly features for easier diabetes management at competitive prices. The smart and powerful data management is compatible with the On Call® Diabetes Management Software. Additionally, the On Call® Extra is certified to be compliant with the new ISO 15197 2015.
Fast and Reliable
• Tiny 0.4 µL sample size
• 4 seconds to result
• Clinically proven accuracy at a hematocrit range of 25-60%
• Audible fill detection reduces wasted strips
Easy to Use
• User friendly design
• Large display with bold numbers
• Auto code calibration circuitry in every strip
• Convenient test strip ejector
• 5 daily test reminders
• Hypo, hyper, and ketone alarms
• 7, 14, 30, 60, and 90 day averaging
• Re-dosing capability within 3 seconds
• You can switch between MG/DL or MMOL/L
On Call GK Dual Keton Control Solution 3 bottles (2 mL/bottle)
The On Call® Ketone Control Solution contains a known concentration of β-Ketone. It is used to confirm
that your On Call® Blood Ketone Test Strips and On Call® GK Dual Blood Glucose & Ketone Meter are
working together properly and that you are performing the test correctly
Control solution 0 contains less than 0.01% β-Ketone (active ingredient), Control solution 1 contains less
than 0.04% β-Ketone (active ingredient) and Control Solution 2 contains less than 0.06% β-Ketone
(active ingredient), all with preservatives in an aqueous based mixture.
On Call Chosen Control Solution 3 bottles (2 mL/bottle).
For use with On Call Chosen and On Call GK Dual.
The Control Solution verifies the proper operation of your glucose monitoring system by checking the test strips and meter against a pre-calibrated control solution.
Three levels of control solution are available labeled Control Solution 0, 1 and 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.