Meet the Enobio 2 StarStim: a brain monitoring helmet for treating patients, research, and other applications. It measures electrical currents in the brain and stimulates it with direct current. It can also be used to track activity. You have the option to record the data on a SD card or transmit it to a computer via Bluetooth.
You will be able to pick these up with 8, 20, and 32 channels. The interface supports recording and visualization of 24 bit EEG data at 500 S/s.