A portable outdoor high-decibel whistle, very loud, very small and portable, set with a key chain, can be easily hung to the key chain above, unique air duct design, making portable and very easy to print
一款便携的户外高分贝哨子,非常响亮,很小很便携,设置有钥匙扣,可以轻易地挂到钥匙扣上面,独特的风道设计,使得便携同时非常好打印