The Long Range Sense-U Smart Sock Shoe Baby Monitor tracks your baby's heart rate, and movement during sleep from anywhere, providing peace of mind and promoting better sleep. With an on-device sleep status indicator and audible notifications, the smart sock shoe can be easily used on its own, or becomes even smarter with lights and sounds from the included Base Station, along with app notifications when paired with the app.Use it with the Sense-U 2K Baby Camera for complete monitoring of your baby's heart rate, video, cry, and background audio, ensuring you never miss a heartbeat or movement while your baby sleeps soundly with the sock on.The Sense-U Smart Baby Sock Shoe is FSA / HSA eligible, making it the perfect gift for your baby registry, baby shower, or as a pregnancy must-have and post partum essential.Please note that the socks can only be worn on the right foot.