Còi thổi điện tử dùng cho huấn luyện thể thao

Specifications: Three optional sound effects, loud and clear voice. Portable size, light weight, easy to carry with. Cylinder shape pronunciation mouth, long dissemination distance. Great for traffic command &lifesaving, military training, sports competitions and training and pet training. Item Name: Whistle Material: Acrylic Battery: 4 x CR2302 (Included) Features: Portable, Wide Application, Loud Sound Size: 13.6cm x 3.8cm/5.35" x 1.5" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Whistle