1.) Put the monitor back on its charger to reset the monitor and charge it --> Band flashing Red, charge for 2 hrs until it no longer flashes Red.
2.) Try resetting the Bluetooth --> open your Settings and under Bluetooth, look for the "RHYTHM+.." then choose the option to forget this device. Wait until you're back in the Mightier app to turn the monitor back on.
3.) Is the band on right? --> the band should be worn on the non-dominant forearm or bicep, away from the wrist and elbow. The green sensor lights should be directly against the skin and the monitor should be snug enough that it doesn't move around.
...Still not working...?
If this is your very first time getting set up and you have never been able to get connected, try reinstalling the Mightier app or send a message to firstname.lastname@example.org so we can get to the bottom of it!