The Sense-U Baby Monitor 2 monitors your baby’ vitals and provides you peace of mind and better sleep. The device communicates with the base station using Bluetooth Low Energy(BT4.0 and up) technology which has almost ZERO radiation level and an open-air distance up to 50 feet(15 meters).
https://www.amazon.com/Sense-U-Breathing-Rollover-Movement-Temperature/dp/B08BR5HP7C