【Made in Germany】Herm Sprenger A famous dog whistle manufacturer in Germany. I bought this at Kiddyland, intending to get a dog... but it didn't work out. I never used it and just put it away. If anyone is interested, please let me know. Adjustable ultrasonic dog whistle, with a maximum range of 400 meters. - Color: Blue - Type: Dog Whistle - Description: Adjustable whistle for dog training - Function: Ultrasonic sound generation - Range: Up to 400 meters Thank you for looking.