The BrainDriver V2.1 is a compact and easy-to-use transcranial direct current stimulation (tDCS) device. The device comes with reusable electrodes that provide a secure and comfortable fit and are designed to be placed on the forehead. The device also features a simple and intuitive interface that allows users to adjust the intensity and duration of the stimulation session. The simplicity of this device is also one of its cons. The device only lets you select a 20 or 30-minute timer as well as 4 current settings (0.5 mA, 1 mA, 1.5 mA, and 2 mA). Though these are common settings, other devices in the same price point allow full customization of the session parameters. 

The BrainDriver V2.1 i is small and lightweight, making it easy to transport and use on the go, which is a nice touch for users who want to use the device regularly. 

In terms of performance, the BrainDriver V2.1 has received mixed reviews from users. Some users report that they have noticed an improvement in their cognitive function after using the device, while others have not noticed any significant changes. It’s worth noting that individual results may vary, and some users may be more responsive to tDCS than others. During out testing, we found the ramp up and ramp down times to be too quick. These should be spread out over 20-30 seconds to avoid a feeling of lightheadedness.

Overall, its design and ease of use make it an appealing option for anyone who is interested in trying tDCS.