What is the TWS1 Color code?

Charging: place the headphones into the charging case.

The red light lit in a breathing pattern = charging   

Red light off = fully charged

Charging time: about 1.5 hours for a full charging

Red light is off during charging: When the headphones are not used for long periods, the battery will enter the sleep state, it needs to charge about 30 minutes and then the red light will be lit.