[Humanized & Free Remote Control]: Our anti-barking collar only has automatic mode, and the remote control cannot be connected. When it detects a dog's barking, it automatically releases a harmless citronella spray. The spray can only be triggered by barking twice or more in 10 seconds, which is more humane, safer and more effective than electric shock collars. 【No lemongrass spray】[Adjustable sensitivity and spray volume]: Our citronella bark collar has 2 levels of sensitivity and 2 levels of spray volume. You can choose the most appropriate combination of sensitivity and spray volume based on the environment and the size of your dog. 【Please refer to the picture for operation details】【Charging & Waterproof】: Due to the built-in lithium-ion polymer battery of the barking collar, it only takes 1.5~2.5 hours for normal use for 10 days. The waterproof design allows dogs to play in splashes or rain, but please do not submerge it in water. Do not use while bathing or swimming.[FITS ALL SIZES OF DOG]: We send 2 reflective nylon collar straps to allow you to change your dog's appearance. Adjustable straps (3 – 21 inches, approx. 7.6 – 53.3 cm)) make the bark collar fit dogs of all sizes (8 – 120 lbs). We recommend bark collars for dogs over 8 lbs (about 3.6 kg) over 6 months of age. Suitable for small, medium and large dogs. Not suitable for domineering dogs / long-nosed dogs / dogs with odor disorders / long-necked dogs.[Perfect after-sale service] Professional service: It is recommended to replenish lemongrass before each use. This ring cannot be matched with the remote control. If you have any questions, please contact us and our professional services team will answer.