Feature: 1. The electronic whistle can avoid mouth contact, and is very suitable for referee coaches, P.E. teachers, navy, outdoor camping, sports competitions, traffic guides, pet training, self-defense emergencies. 2. There are 3 tones and 3 levels to meet different needs. High volume, can provide up to 120-150dB sound power. It is easy to attract attention. At the same time, compared with traditional whistles, it can also make a louder, stronger and consistent voice. 3. One LED light can be used for lighting, or outdoor camping. Emergency flashlight can also be used to send SOS light for outdoor rescue signal. 4. This electronic whistle is made of high-quality ABS environment-friendly materials, tasteless and healthy. 5. With lanyard, suitable for various indoor and outdoor sports. The 6F22 9V dry battery(not included) is used for longer and more durable use. Specification: Features: The electronic whistle can avoid mouth contact, and is very suitable for referee coaches, P.E. teachers, navy, outdoor camping, sports competitions, traffic guides, pet training, self-defense emergencies. There are 3 tones and 3 levels to meet different needs. High volume, can provide up to 120-150dB sound power. It is easy to attract attention. At the same time, compared with traditional whistles, it can also make a louder, stronger and consistent voice. One LED light can be used for lighting, or outdoor camping. Emergency flashlight can also be used to send SOS light for outdoor rescue signal. This electronic whistle is made of high-quality ABS environment-friendly materials, tasteless and healthy. With lanyard, suitable for various indoor and outdoor sports. The 6F22 9V dry battery(not included) is used for longer and more use. Specifications: Item: Electronic Whistle Material: ABS Battery: 6F22 9V Dry Battery(not Included) Size: 14*4.3*3.3cm Package Size: 16.2*5.6*4.1cm Package Weight: 99g Package List: 1* Electronic Whistle Package List: 1* Electronic Whistle