When using the Text to Speech feature, the number of characters you input determines the consumption:1. We offer two voice options: Basic and Pro. Pro provides higher quality sound.2. Using Basic voice consumes characters equal to the number you input; opting for Pro voice consumes five times as many characters as Basic.3. If you participate in the new user invitation promotion, Pro voice consumption can be reduced to between two to four times the input characters; otherwise, it remains at five times.