Wearable band for health monitoring device

A wearable device configured to monitor physiological parameters of a wearer, the wearable device comprising:

• a physiological parameter measurement sensor configured to monitor a plurality of physiological parameters;
• a hardware processor;
• a power source configured to power at least the wearable device and the physiological parameter measurement sensor;
• a display in communication with the hardware processor, the display configured to display the plurality of physiological parameters monitored by the physiological parameter measurement sensor;
• and
• a band comprising a plurality of characters and configured to secure the physiological parameter measurement sensor to the wearer;
• wherein the hardware processor is configured to:
• obtain a first plurality of signals from the physiological parameter measurement sensor when the band is secured to the wearer at a first tightness;
• determine a signal quality responsive to the first plurality of signals;
• and
• output an indication on the display to adjust tightness of the band with respect to a wrist from the first tightness to a second tightness based on the determined signal quality;
• wherein the indication comprises displaying at least one of the plurality of characters on the display.