WHICH IS THE BEST BABY MONITOR OF 2019?

I have already had the owlet camera set and hated it. Camera is delayed 30 seconds in speaking or what baby is doing cant stand it plus the foot monitoris garbage. My daughter is having open heart surgery July 11th I'm needing something reliable for during the day and night vision and one that may have great battery life if not hooked up to the charger while in use in the house(the monitor part).

Much appreciated ladies