Smart Sock 3 Extension Pack
Our Extension Pack allows you to continue tracking your child's heart rate, oxygen level, and sleep trends up to 5 years of age. The included toddler-sized fabric sock works with your existing Sock 3 sensor, and our optimized technology continues to provide accurate readings as your child grows, between 30lbs to 55lbs. Continue to monitor your child through every milestone - from teething to toothfairy. Smart Sock sensor is not included and must be purchased separately.