Fangrui Product Details [rechargeable Easy To Use]: Our Sonic Anti-bark Device Can Be Easily Hung On A Tree, Garden Fence, Table, Or Dog House, Very Convenient To Use On Your Or Your Neighbors Barking Dog. The Anti-bark Device Has A Built-in 800 Mah Rechargeable Battery, Which Can Be Charged For 40min And Can Be Used For 2h, Simple To Operate And Easy To Use, Its A Friendly Dog Barking Device For Your Furry Friend (please Charge The Device Before Use). [durable Waterproof Dog Silencer]: This Anti Dog Barking Device Has An Ipx4 Waterproof Casing To Withstand All Kinds Of Bad Weather, So You Dont Have To Use The Dog Barking Control Devices Because Of The Weather, No Matter In Sunny, Rainy, Or Snowy Days, Our Bark Stopper Can Stand Up To The Test, And You Can Rest Assured That The Dog Deterrent Devices Is Safe To Use Outdoors. [safe Effective Barking Box]: Our Ultrasonic Dog Barking Control Device Uses Advanced Ultrasonic Technology To Stop Excessive Barking Without Harming Your Beloved Pet. The Gentle Yet Effective Ultrasound