Emfit QS
TECH SPECS 
DescriptionEmfit QS is the world’s first heart rate variability enabled contact free sleep tracker. It is automatic and installs under a bed mattress.
BatteriesElectricity outlet
ConnectivityWiFi
DisplayFlashing lights (smartphone app for insights)
Other
METRICS 
Sleep durationYes
Sleep stagesRem, deep, light
Sleep interruptionsYes
Time to fall asleepYes
Heart rateYes, including full night heart rate variability
Room environmentNo
Smart alarm
OtherRespiration rate, resting heart rate
LINKS 
Affiliate link*Amazon
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