"High quality and loud volume": 3 types of whistle sounds 4th grade volume - Press the mode switch button to select 3 different types of whistle sounds.
Product model number: K11 Color: Black Battery included or built-in: Yes Product size: 11.1 x 3.15 x 3.15 cm; 68 g
![ASWAYKE Electronic Whistle IPX5 Waterproof Loud Volume 125db Rechargeable 1000mAh [4 Levels 3 Types of Whistle Sounds] Electronic Whistle Sports Referee Disaster Prevention Security K1 Black](http://megashopjapan.com/cdn/shop/products/51ia8xy7PnL._AC_US1200.jpg?v=1710254317&width=1445)
![ASWAYKE Electronic Whistle IPX5 Waterproof Loud Volume 125db Rechargeable 1000mAh [4 Levels 3 Types of Whistle Sounds] Electronic Whistle Sports Referee Disaster Prevention Security K1 Black](http://megashopjapan.com/cdn/shop/files/71RLoFpyyXL._AC_US1000.jpg?v=1714026363&width=1445)
![ASWAYKE Electronic Whistle IPX5 Waterproof Loud Volume 125db Rechargeable 1000mAh [4 Levels 3 Types of Whistle Sounds] Electronic Whistle Sports Referee Disaster Prevention Security K1 Black](http://megashopjapan.com/cdn/shop/files/7144HZM802L._AC_US1000.jpg?v=1714026363&width=1445)
![ASWAYKE Electronic Whistle IPX5 Waterproof Loud Volume 125db Rechargeable 1000mAh [4 Levels 3 Types of Whistle Sounds] Electronic Whistle Sports Referee Disaster Prevention Security K1 Black](http://megashopjapan.com/cdn/shop/files/71k_GAw0LTL._AC_US1000.jpg?v=1714026363&width=1445)