This sub-system is designed to collect and transmit the values of SpO2 and Actimetry. It represents a baby bootee and serves for maintaining oximeter sensor and the electronic insole including oximètre, actimètre, the radio transmission module , and a rechargeable battery.

Parts of socks in contact with the skin are in cotton textiles. Other materials used for the manufacture of socks are polyamide / spandex and polyurethane foam.

The bootee is available in two versions, depending on prescription and size of the child.

The "baby" of bootee designed for use within the family (children between 1 and 6 months) is near a  barefoot type  .

This bootee version can fix a removable sensor (reusable sensor Nonin 8008J) and accommodate electronic tread.

The electronic sole represents a shell containing PVC boards and a rechargeable battery 3V. A connector is built into the sole to connect the oximeter sensor circuit or battery charge. The weight of the sole electronic sensor is 27 grams (31g with the sensor 8008J, 32 g with the sensor 7000N.)