If you are looking for a dog anti-barking device , then your research is over here. That's because our product can meet your need. Adopted of premium ABS material, it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience. Features - Color: Blue- Material: ABS- Size: About 12.00X3.00X3.00cm/4.72X1.18X1.18inch- It's made with excellent workmanship, with creative design, convenient to use.- The ultrasonic sound can be heard by dogs but is silent to humans, and very safe for human.- The device works on dogs of most breeds and sizes, and practical and convenient to use. - Premium material and fine craftsmanship, sturdy and durable for a long time.- Ultrasonic dog training, safe and effective; The dog will stop barking when provoked by the sound. Specification- Sound Wave Frequency: 20-25KHZ - Sound Mode: 1. Continuous 2. Intermittent 3. Frequency Hopping- Battery Capacity: 300MA- Voltage: 3.7V- Standby current : 32uA- Ultrasonic (peak value): 510 - Sound (peak): 280 - Charging input voltage: 5 (V) - Charging current: 350 (MA) - Charging time: 1.5(H)- Power adapter: DC5V/500mA - Power : 2(W) Packing list: 1 x Bark Stopper