Features: Multi-function:This N10 dog barking deterrent device has 3 functions, First: it is a flashlight function, Second: the buzzer function.Third: ultrasonic function.Different functions are suitable for different scenarios, which are not only practical but also diversified. Large power storage and remote range: Our N10 ultrasonic dog repeller has a large battery of 1200Mah, and has its own power saving function, fast charging for 2 hours, long standby time of 30 days, and normal use up to 20 days. The range of influence is wide, and the actual environment can reach 10 meters (about 33 feet). Elaborate design: This anti dog barking device has a suitable body size and can be used by both adults and children. And dog barking deterrent devices are equipped with a lanyard, which can be worn on your hand or on your school bag, which is very convenient to carry and will not occupy your hands. Material: The shell of our ultrasonic dog bark deterrent device is made of sturdy and durable ABS material. The surface is smooth, and the touch is comfortable. The lanyard of the stop dog barking device is made of strong Made of nylon material, you don't have to worry about it breaking easily, which is Very strong and durable. 1.Independent strong light 3W flashlight, with three modes of long light SOS and burst flashing; 2.Independent ultrasonic button function; 3.Independent Beep sound button function; 4.The actual environment can reach 10 meters; 5.3 channel switching; (1 fixed frequency 2 gap frequency conversion 3 random frequency conversion) 6.Configure power display led; 7.Configure ultrasonic working indicator; 8.Large battery 1200Mah, power saving function, long standby time of 140 days, normal use up to 20 days, fast charging in 2 hours; Packing List: 1*Dog Drive 1*Data Cable 1*Instruction