Enjoy the bold and brilliant luminescence that comes from Chip on Board (COB) LED technology with this emergency whistle. This handy and handheld device is just 1.33" x 3.38", crafted from hard-wearing ABS plastic, and comes with a 6" wristlet strap. It's a great item to help you be located in an emergency, and the light has normal and slow-flashing modes to attract attention. Two button cell batteries are included. Add your organizational or company logo or message to create an attention-getting branded promotion.