อุปกรณ์นกหวีดฉุกเฉิน 3 ความปลอดภัยสําหรับทํากิจกรรมกลางแจ้ง

Three different frequencies from three different holes (bass, midrange, treble) When traveling outdoors, it can help you confirm your location, avoid getting lost, find your companions, etc. If you want to have an ideal outdoor trip, don't forget to prepare carefully before you leave! Product details Name: multi-audio survival whistle Material. Plastic Length: 70 mm Width: 27mm Thickness: 7mm Package includes: 1 x whistle