... 2. Battery operated and included 3. Welcome your order Glow Whistle, Flashing Whistle, Promotion Gifts:1. Material: Plastic.2. Battery ... operated and included.3. Welcome your inquiry. Flashing whistle with led color: Red, blue, green, white; ... , press the button again to turn off.Glow Whistle, Flashing Whistle, Promotion Gifts, Sport Gifts. Glow Whistle, Flashing Whistle, Promotion Gifts