Safe And Effective Ultrasonic Dog Bark Deterrent: Optimal distance 16.4ft, max distance 25ft effective range dog barking control devices, 3x faster behavior modification to grab your pets attention and and stop misbehavior. 3-in-1 Safe and Effective Frequency: This anti barking device can emit 25KHZ fixed frequency, 22-25KHZ Undulating and irregular frequencies sound waves, the sound safely grabs your dogs attention and you wont hear it. Barking control suitable for any dog from 6 months to 8 years. 1-2 Hour Rapid Charge: 1000mAh dog barking deterrent charges fast and provide full charge in 1 to 2 hours for about 35 days of regular use. Handheld & Portable: Since our dog barking control for dogs is handheld, small size, You can carry it in your pocket. Just press the button and point the device at the dog while the dog is barking or approaching you, and the dog will stop their bad behavior. LED Flashlight With Multi Settings: It more than just a anti barking control device, a super bright flashlight is included and can be used as a secondary way to stop an approaching dog. Holding down the button will not only emit an ultrasonic sound, but it will also quickly LED flash the bright LEDs and stop a dogs behavior. The bright flashlight can also be turned on and used to light your way home.