Dual-frequency Life-saving Whistle
.Made of high-grade plastic
.Size in 7.3cm length, 2cm width,1.5cm thickness, clip in width 2cm, effective length 4cm
.4 Color available ,orange, green mud-color black
Feature:
.Dual-band design, made it is possible to sound high-low frequency sound to ensure excellent effective in different condition
.Anti-off whistle mouth design,made it is not easy to blow out when use without hand
.Easy to speak out,made us keep enough energy
.Integrated design and beautiful appearance, sturdy and reliable.
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