Our goal is to produce tDCS devices of the highest quality standards, which operate with precision and guaranteed accuracy, therefore we do not include current meters in our products. Analog current meters are incredibly inefficient, and are only required for tDCS devices which do not have proper voltage/current control and adaptation circuitry in place.
The Brain Stimulator tDCS devices include enhanced circuitry comprised of precision components, integrated circuits, and microprocessors ("smart" technology) which control and monitor current and voltage levels several times a milliseconds. Through the use of these special technologies, and by nature of design, our products do not require the user to monitor current flow. However, tDCS devices which use rudimentary circuitry must include a current meter, as the user must constantly monitor and adjust the output flow in order for the device to produce accurate current.
In some ways this can be compared to manual (stick shift) cars versus automatic cars. With a manual gear shift automobile, the drive must constantly monitor the state of the automobile to know when he or she needs to change gears (adjust the device). However, cars which utilize automatic shifting do not require the constant attention of the driver as the technology within the car "adjusts" (shifts) itself at the optimal time.