September 25, 2020 2 min read

The SmartPebble sits inside your child's SmartSleeper to monitor the internal sleeping bag temperature, their position and movement levels.  It does this without touching your child but it is an electronics device that emits electromagnetic frequencies and so we want to make sure that it is safe and we want to provide you with the information that you will want.

The purpose of this page is to let you know what standards apply and how the SmartPebble complies with those standards and to try and do this without too much technical jargon.

The first thing to understand is that the SmartPebble uses ultra Low Energy Bluetooth to send the data that it collects to the SmartBridge.  LE Bluetooth technology is used in a number of similar devices for babies and for adults, where there a need for a device to be in close proximity to a person for an extended period of time.  This is because the power output of LE Bluetooth devices is typically more than 1,000 times less than your phone and about 80 times less than traditional audio/visual monitoring device.

Using LE Bluetooth has allowed us to massively reduce power consumption and that is associated with reduced Special Absorption Rate (SAR) which the is the rate at which a body absorbs radio waves.  Another practical measure of how much we have reduced power use is that we have achieved a 9 month battery life.  This is because the Pebble is only actively using any energy for a maximum of 3/1000ms (3 milliseconds in every 1000 milliseconds) or 0.3% of the time.

The SmartPebble sends the data it collects to the SmartBridge (which also has a LE Bluetooth chip).  The Bridge will be connected to the local WiFi and it is through the WiFi network that the data is sent to our servers.  The Bridge can be located well away from your child so that any emissions from that device will be negligible and no different from having an audio / video monitor located on the other side of your child's bedroom.  

We recognise that the decision about whether to use a monitor is a personal one and that for some parents will prefer to not use the technology.  If that is you, we hope that you but you have taken the trouble to read this page we imagine that you're looking for ways to better manage your child's comfort and so we hope that you might consider combining our Sleepers and our TOG rated Blankets as a more effective way to have control over your child's temperature.  We've designed them to be work perfectly with or without the technology.  Either way we hope that you have found this information and please don't hesitate to message us if you have any further questions.



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