Sense-U Baby Breathing Monitor

Sense-U Baby Breathing Monitor - Tracks Baby's Breathing Movement, Temperature, Rollover and Sleeping Position for Baby Safety with Audio Alarm on Smartphones Purchased for my twins when they were born, but didn’t use them a lot. I paid $89.99 each, but the price has gone up significantly. Selling each one for $43 The black smudge is from each babies initials so we knew who’s was who’s when wearing them! I tried to get it off but won’t budge any more but still works perfectly! ONLY ONE LEFT

• ConditionNew
• Age0-12 months