Ultrasonic Anti-Barking Device Pet Dog Bark Control Repeller Away Stop Barking Features: Dog Silencer and Dog Trainer - This dog behavior correction device helps with dog training and behavior assistance. It has sound and two ultrasonic modes, with a frequency of 22-25 kHz, which is difficult for humans to hear. It's like an electronic dog whistle. Effective - The barking control effectively retrains barking. They are safe for dogs aged 5 to 120 pounds, 6 months to 8 years. Using this barking control can also prevent your dog from chewing, digging, and other destructive behaviors. Safe and Lasting - Dog bark deterrence can reach up to 16 feet and is turned off as a safety feature after 10 seconds. It has a super large milliampere hour battery that can operate without recharging for up to 30 days. Easy to carry and use indoors and outdoors - The ergonomic design is perfect for your hands, while the mountaineering clasp allows you to take this ultrasonic dog bark deterrent anywhere. Specification: Model and name: DN110 Specification attribute: ultrasound+ultraviolet lamp Color box size: 15 * 2.6 * 2.6cm Product weight: 56G Package included: Dog driver * 1 Charging line * 1 Instructions * 1