Ultrasonic Dog Training Whistle with Keychain includes the following features :

• By loosening or tightening the inner sonic adjustment screw, you can seamlessly modify the tone pitch until you find the exact frequency your pet responds to best
• The vibrant plastic sleeve shields the fine metal threads from dirt, dust, and moisture while keeping the adjustable components locked safely in place
• Relies on premium ultrasonic technology that transmits long-distance audio cues easily heard by your dog, while remaining quiet and non-disruptive to human ears
• A sturdy, integrated metal keychain ring at the top allows you to attach the device securely to a lanyard, wrist strap, or house keys for quick-access training

Material :

• Copper/brass with plastic housing

Size closed :

• Length of 8 cm x Diameter of 0.7 cm
• Weight of 16 grams