1.Getting Started #

1.1.Stimulation Warning - Important! #


You should not use the foc.us stimulator if you suffer from epilepsy, seizures, brain lesions, bipolar depression or severe heart disease. Immediately stop using foc.us i you experience short-term negative effects. Foc.us is not a toy and is not intended to be used by anyone under the age of 18 years old. It is not recommended to place external electrodes in un-tested or novel montages. Do not position electrodes in a manner where current may pass through the brainstem. Do not position electrodes over cuts, grazes or damaged skin. Allow at least 48 hours between each use of foc.us. Always place wet sponges between the electrodes and your skin. Do not touch the black conductive silicone electrodes when using foc.us.



Foc.us is designed to be used by healthy adults who do not suffer from epilepsy, brain conditions, have a metallic implant such as a skull plate or have implants, such as cochlear implant or pace-maker. The sole purpose of foc.us products is for cognitive gain.

1.2.Getting Started #

1.3.Charging Your Dev Kit #

2.Focus EEG Dev Kit Features #

2.1.WiFi & configure.dk #

2.2.EEG Dev Kit Control - foc.us/me #

2.3.Raw EEG Data #

2.4.tES Stimulation Electrodes #

2.5.EEG Electrodes #

2.6.Headcap #

2.7.EDF+ & BDF+ Recordings #

2.8.fNIRS Sensor #

2.9.tDCS #

2.10.tACS #

2.11.Using Your Own Server #

3.Focus EEG Dev Kit Programs #

3.1.Focus Gamer Stimulation Program #

3.2.Ripple Stimulation Program #

3.3.Focus 3rd Eye Porgram #

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4.Maintenance & Troubleshooting #

4.1.Focus EEG Dev Kit Specifications #

4.2.LED Color Chart #

4.3.Troubleshooting #

4.4.Firmware Updates #

4.5.Cleaning & Storing #

4.6.Warranty & Guarantee #

foc.us warrants the foc.us device device (the “Product”), and only the Product, against defects in materials and workmanship under normal use for a period of twelve (12) moths commencing on the date of original purchase by the original purcaser (the Warranty Period). This warranty does not cover damage caused by misuse, abuse, natural and/or external causes (e.g. fire, earthquake, flood etc…), use other than as intended and described in the Product instruction manual, finishes, normal wear and tear,  tampering, unreasonable use, service performed by unauthorized service agents, or loss of damages to the battery. foc.us does not warrant that the operation of the Product will be uninterrupted of error free.

Limitation of remedies

Under this Limited Warranty, foc.us liability and customer’s exclusive remedy under the foregoing paragraph will be limited to replacement or repair of the Product by foc.us or its authorized service centers. A replacement Product or part assumes the remaining warranty of the original Product or ninety (90) days from the date of the replacement or repair, whichever is longer. To obtain warranty service contact help@foc.us. For your security please return your Product with an insured carrier (e.g. FedEx, UPS, USPS Parcel Post) and retain your receipt. foc.us is not responsible for items damaged or lost in transit. Other than for the reason of hardware defects, the return freight cost responsibility belongs solely to the customer.

Limitation of damages

In no event will foc.us or any of its affiliated or subsidiary companies be responsible for any special, incidental, or consequential damages resulting from the use of this Product, or based on any breach of warranty, breach of contract, negligence, tort, or any other legal theory. Such damages may include, without limitation, loss of savings, or revenue, loss of profit, loss of use, the claims of third parties, including without limitation, retailers, any cost of any substitute equipment or services. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you. The warranty gives specific legal rights, and you may have other legal rights, which vary from state to state or country to country. This Limited Warranty is valid only in the United States and Europe for Products sold in the United States and Europe. Reseller, agents or employess of foc.us are not authorized to make any modification, extension, or addition to this Limited Warranty.


FCC warning statement: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operation. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment End users must follow the specific operation instructions for satisfying RF exposure compliance. This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.


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