Thanko claims the armpit fans are very light (30g/1 oz) and silent enough to use even in a crowded, so you shouldn't have to worry about attracting unwanted attention with your buzzing armpits.

Thanko宣称腋下风扇非常轻巧（重30g或1盎司），并且即使在拥挤的人群中使用也足够静音，所以你不必担心嗡嗡作响的腋窝会引起不必要的注意。