Product information:

Color: White
material: plastic
Work distance: 50 feet / 15 meters
5 / 20kHz frequency is most commonly used in dogs
Features: 1. Built-in pickup detecting dog twins 2. The sound control speaker, producing ultrasonic waves and emits
3, digital display, charging 4, ultrasonic wave has 4 frequencies can be selected, different types of pets or animals, ultrasonic waves more effective

Packing list: 

1 * stopper + 1 * USB cable + 1 * manual