Dog Barking Control DevicesSafe and efficient dog barking control can emits an ultrasound, which will make barking dogs become quiet and less aggressive. This electronic dog whistle equips with 800mah rechargeable battery.Range EffectivelyThe working range is 5 m, the device getting closer and closer with the dog, the device will work nicer, effective pet corrector for dogs of all types and sizes of age 6 months to 8 years old.Training And Repellent ModesTraining mode emit a lower intensity ultrasonic sound to assist you correct dogs bad behaviors and to teach it how to be polite act and training their brain to become smart pet in our daily life.Repellent ModeEmit a higher intensity ultrasonic sound while with the flashlight flashing to drive the fierce dog away, such as stop excessive barking, fighting, biting, and other bad behaviors.Humanization Carry DesignDesign with anti mistake lock and LED light to use at the dark place and in the evening, potable anti-barking device comes with humanization to hold. It is delight design and suitable for indoor and outdoor use.Specification:Material: ABSColor: frosted grayAppearance process: matteCharging Time: 2-3 hoursUse Time: 15 daysBattery Capacity: 800 MAHFunction: ultrasonic dog repellent+SOS function+LEDSize(approx.):(W x H)4 x 10 cm/1.57 x 3.94 inchPackage Included:1 Pc x Dog Barking Control Device1 Pc x Charging Cable1 Pc x LanyardNote:1.Due to the light and screen difference, the item039;s color may be slightly different from the pictures.2.Please allow 1-2 cm differences due to manual measurement.