Features:*Dog Bark Control and Dog Training - Our anti-bark device provides a safe and effective solution for dog training and bark control. 3 degree sound frequency range meet your different distance need.*Suitable for All Size Dogs - The bark control emits a super audible frequencysound at 15KHZ-30KHZ the sound doesn& 39;t affect humans and animals but can grab the dog& 39;s attention and deterrent them from barking.*Convenient to Use Outdoor - With the sensitive degree of 3 tap position the control range of the deterrent is 10 meters. As we use advanced technology it works effectively on all sizes of dogs. IPX4 waterproof function and with a lanyard that the device is very suit hanging on the tree.*Portable Size Rechargeable - The device fits perfectly in your hand. With a chargeable lithium battery only take 5hrs charging for 30 days& 39; work time.*Tips for you - The anti-bark device doesn& 39;t effective in dogs with hearing problems and we don& 39;t recommend using this product on dogs under 6 months and below 8 years old as it may disrupt the dog& 39;s development of hearing. Training is required to achieve highly effective and long-lasting use.Specification:Item Name: Anti-Barking DeviceMaterial: ABSColor: BlackPower: 3.7V 1500mah Lithium BatteryControl Distance: 10 metersCharging Time: 5hrsUsing Time: 30 DaysSize: 11 x 8.5 x 4.9 cmWeight: 140gPackage Size: 11.5 x 5.5 x 9 cmPackage Weight: 190gPackage List:1 x Anti-Barking Device1 x Lanyard1 x Charging Cable2 x Nail1 x User Manual"