Creative Color Ultrasonic Dog Training Whistle

 Product information:

Material: plastic, nickel-plated copper
Specifications: rose red, blue, white, black, yellow, red, separate lanyard
Product size: about 7.7cm in length and 0.6cm in diameter
How to use: Loosen the sonic adjustment screw. While blowing air in from the air inlet, rotate the adjustment lever to adjust to the exact pitch. After the adjustment rod is screwed, tighten the sonic Adjustment screw

Packing list: 

1*whistle/1*lanyard