There wasn't a manual with mine. Don't waste your money. Some reviews complain about the fit and some say it's an "okay" fit. I took a chance because I seen everyone's pictures and videos. It doesn't fit. I cover my nose and it barely reaches my chin. I pull it down to cover my chin and it's touching the end of my nose. So if you wear this at night then it won't cover all & keep you warm. It looks perfect on my little niece. Why take a chance if some masks fit some adults and some would only fit a child. Good lights. The technology product inside the mask moves around. Another little technology piece hangs out the side so you got to keep hiding it on the inside of mask.
Xiaomi Watch S1 Wi-Fi Global Smartwatch for Russia, Black/Black leather strap black fluoroplast strap
38 Review
CASIO W-800H-1A Wrist Watch
63 Review
Smart bracelet Xiaomi Mi Smart Band 7 Global for Russia, black
219 Review
CASIO A-168WA-1 quartz watch, alarm clock, chronograph, stopwatch, waterproof, display backlight
45 Review