Easy to use: operate by single hand.
Strong loudness， the same effect as traditional whistle.
Handy and hygienic without blowing the whistle.
Suitable for all sporting events.
Alert for emergency situations where a threat to persons exist.
Small size, convenient to carry.
With a lanyard to hang on the neck to avoid losing.
Precise workmanship and high quality.
Battery: 4*Button Cell(not included)
1 x Electronic Whistle
1 x lanyard