Check the listing for details. Ultrasonic Dog Bark Deterrent Devices Anti Barking Control Training Tool 4 Mode. Condition: New. Listed at 29.99 USD. 1.4 Training Modes:Our ultrasonic dog bark deterrent offers 4 training modes-Sound Mode, Ultrasonic Mode, Flashlight + Ultrasonic Mode,LED Flashlight Mode, easy to use. 2.Remote Control:Our dog barking deterrent devices feature convenient remote control,enjoying safe, long-distance control to correct unwanted behaviors. 3.Safe & Humane: After emitting ultrasonic for 8 seconds, this bark deterrent device will stop working to protect our dogs.(Note: This device could only be used on dogs from 6 months to 8 years old) 4.TYPE-C Fast Charge: With a Type-C fast charging port, barkshield for dogs has a 1200 mAh battery, only takes 2 hours to fill up and can keep 6 months standby time. 5.Portable & Lightweight: Our pocket-size stop barking devices perfectly fit into your pocket, bag, or hand.