The crib mattresses could create a gap between the mattress and crib ends larger than allowed by federal regulations, posing an entrapment hazard to infants.
The end caps of the kaleidoscope can be removed and expose small parts that can come loose and pose a choking hazard to small children and internal components that pose a risk of laceration.
The S1+ hardware can fail, resulting in an inability to transmit a discoverable signal during an emergency situation, even as the unit appears to be powered on and functioning properly.
