TABLE 3.

Summary of technical characteristics of mobile EEG devices

Mobile EEG System	Electrodes	Battery	Sample rate	Number of Channels	Electrodes Placement	Resolution	Wireless/Bluetooth data transmission	Seizure detection algorithm	Support for the application or use of the system
Sensor Dot (SD, Byteflies, Antwerpen, Belgium) 26	Removable electrodes attached by disposable patches	Rechargeable (up to 24 h)	Up to 256 Hz	Up to 4	Behind each ear (but other configurations are possible)	24 bits	No	No	Support needed to attach the active EEG electrodes on the scalp. Expert and non‐expert can be trained to apply it
Custom made mobile EasyCap (combination with Smartphone Brain Scanner−2 (SBS2)) 30	Ring electrodes (Gel)	Rechargeable (up to 12 h)	Up to 128 Hz	14	10–20 system	24 bits	Yes	No	Expert and non‐expert can be trained to apply it (<1 h training)
Epoc+ (EMOTIV, San Francisco, California, USA) 20	Saline based electrodes	Rechargeable (up to 12 h)	128 to 256 Hz	14	10–20 system	16 bits	Yes	No	Expert and non‐expert can be trained to apply it (4–5 min to apply it)
CerebAir EEG headset and amplifier (Nihon Kohden Europe, Rosbach, Germany) 64	Pre‐coated gel electrodes attached by a push button at specific positions of the headset	Rechargeable	N/A	8	10–20 system	N/A	Yes	Yes	Expert and non‐expert can be trained to apply it
Epilog (Epitel Biotechnology, Salt Lake City, Utah, USA) 28	Removable electrodes attached by adhesive patch	Rechargeable (up to 7 days)	Up to 512 Hz	1	Behind ear or on forehead	24 bits	Yes	Yes	Minimal support – patient can be independent
EpiHunter (EpiHunter NV, Hasselt, Belgium) 51	Three gold‐plated frontal copper dry sensors	Rechargeable (up to 4 h)	N/A	3	Electrodes mounted on a Velcro strip and removable head band	N/A	Yes	Yes	Minimal support – patient can be independent
Eego amplifier‐series with 8 channels EEG Cap (Ant Neuro, Hengelo, Netherlands) 48	Dry silver electrodes	Powered via connection with a computer	Up to 2084 Hz	8 up to 64	10–20 system	Up to 24 bits	no	No	Expert and non‐expert can be trained to apply it (<1 h training)
Enobio EEG (Neuroelectric, Barcelona, Spain) 58	gel or dry electrode solutions available	Rechargeable (operating life of 5.5 h with wireless data transmission)	Up to 125 Hz	8 up to 32	10–20 System	24 bits	Yes	No	Expert and non‐expert can be trained to apply it (<1 h training)
Wireless behind the ear‐EEG protorype 63	Silver/silver chloride wet gel electrodes	Rechargeable battery (± 6.5 h)	256 Hz	2	Behind each ear (but flexible position, other configurations are possible)	12 bits	Yes	No	Expert and non‐expert can be trained to apply it
Intra‐ear‐EEG prototype 23	Four wet in‐the‐ear recording electrodes embedded in an earpiece	Powered via connection to an external amplifier.	256 or 1024 Hz	4	Specific positions within the external auditory canal	N/A	No	No	Support needed to place gel in the active EEG electrodes
Mobile single channel EEG prototype 40	Three electrodes (Ambu Neuroline 700 Denmark)	Powered via connection to an external amplifier.	128 Hz	1	Specific position: one attached on Fp1 (Reference), one on F7 (Active1) and one on TP7 (Active2)	N/A	No	No	Support needed to place the active EEG electrodes. Patients can be trained to fix electrodes if needed
Neury, a mobile EEG prototype 24	Standard disk electrodes	Powered via connection to an external amplifier.	Up to 200 Hz	2	Electrodes can be placed in flexible positions	N/A	No	No	Support needed to place the EEG electrodes.
Rapid‐EEG portable EEG headband by Ceribell (Mountain View, CA) 36	Elastic band that contains 10 Ag/AgCl electrodes (19.8 mm). Conductive gel is needed	Powered by an external recorder (Ceribell Model C100)	Up to 250 Hz. Frequency range from 0.5 to 100 Hz	Up to 8	Circumferential 10‐electrode montage‐ Corresponding approximately to the Fp1–F7, F7–T3, T3–T5, and T5–O1 sites on the left and the Fp2–F8, F8–T4, T4–T6, and T6–O2 sites on the right	N/A	Yes	Yes	Expert and non‐expert can be trained to apply it
Prototype of an ear transparent EEG – cEEGrids 62	Flexprint material placed around the ear and held on the skin with an adhesive. Conductive part of electrodes made using Ag/AgCl	Powered by an amplifier located at the back of the head (Smarting from https://mbraintrain.com)	Up to 500 Hz	Up to 10	A total of 10 electrodes arranged in a C‐shape around the ear. Channels on the left: L1, L2, L3, L4, L4A, LAB, L5, L6, L7, L8. Channels on the right: R1, R2, R3, R4, R4A, R4B, R5, R6, R7, R8	24 bits	Yes	No	Expert and non‐expert can be trained to apply it

Abbreviation: N/A information not available.