The FOX40 electronic whistle is an essential item for generating a signal sound useful in emergencies. *It's also effective for sounding a warning in areas where bears might appear!! *This electronic whistle will be useful in the event of earthquakes or disasters. - Brand: FOX40 - Color: Blue - Type: Electronic Whistle - Accessories: Strap - Body Length: Approximately 12cm - Battery: 9V square - Manufacturer: USA - Maximum Sound Power: 125dB (Car horn maximum 112dB) Volume can be adjusted from 0 (off) to 3, with the maximum setting of 3 producing a sound louder than a car horn. Sound output has been confirmed through testing. The battery is expired, so please purchase a new one at your local electronics store or home center. Although it has been used very little, it is being sold as a used item, so please refrain from purchasing if you are sensitive to such matters. Thank you for viewing.