Adhesive gel electrode is a single use/ night electrode. 

Bluetooth signal range can be affected by several factors, such as building materials, where the phone is placed, and the quality of the Bluetooth chip. In general, the Somfit Bluetooth range should allow reliable transmission within a standard-sized bedroom. For best performance, we recommend keeping the patient’s phone on charge, placed on the patient’s side of the bed (if there is a bed partner), throughout the study.

It takes approximately 3 hours to fully charge the devices.  

It is recommended the devices are charged prior to patient collection. Advise the patient to continue charging at home until time of use.  The Somfit blue light and Respifit white light flashes when charging and is solid when fully charged.  When removed from charger, a flashing green light on the Somfit indicates it is ready to record.

The lithium-ion battery will lose approximately 5-10% charge in the first 24 hours then increases its discharge. Temperature can also affect battery discharge. We recommend the device is fully charged before each study. We do not recommend attempting a full night recording if the device has not been charged within the last 48 hours. We recommend charging the device until time of use, especially for longer duration studies. A full charge will provide 12-15 hours of study recording. 

The device has an IP22 rating, meaning it is splash-proof only, and not waterproof.

Frontal electrode placements contain a linear combination of EEG, EOG, and EMG.  The three electrodes in the Somfit allow for both left eye and right eye signals to be clearly seen in the channel data.

The microphone is placed on the lower edge of the Somfit facing down towards the mouth.  The proximity means that it is most sensitive to sounds coming from the mouth such as snores.  The envelope detection frequency response is optimized for the frequency range expected for snoring increasing the sensitivity to snoring and reducing the sensitivity to other sound sources.  The snoring performance was validated in a number of clinical trials.