"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: K1 Color: GREEN Battery included or built-in: Yes Product size: 11.1 x 3.15 x 3.15 cm; 140 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](http://megashopjapan.com/cdn/shop/products/51_QTzv_nuL._AC_US1200.jpg?v=1710236645&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](http://megashopjapan.com/cdn/shop/files/71Bl8V-VLeL._AC_US1000.jpg?v=1714026369&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](http://megashopjapan.com/cdn/shop/files/71BHa_ilQGL._AC_US1000.jpg?v=1714026369&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](http://megashopjapan.com/cdn/shop/files/71vTu49Wf-L._AC_US1000.jpg?v=1714026369&width=1445)