Collar Description:IPX3 rainproof- the receiver can be used in the dog drinking water or rainy days.Accurate Bark Detection for Small/Medium Dogs - Auto-Sensing modes to STOP BARKINGDual-chip Design Anti-false trigger, it will save you from worrying about any outside sound that will affect your pet. The machine should promptly and accurately remind pets.Sprays Harmless Citronella Oil - Mist liquid is made of purely natural lemon essential oil, without CFC.Environmentally friendly products, harmless to humans and dogs.Rechargeable Fast Charging - No worries about replacing the batteries. This anti bark collar for small dogs can be charged using the included USB cable.Adjustable Collar -Collar is adjustable in length from 15cm to 65cm; it fits from Small to Large dogs.Size : 5 x 3.2 x 3.5cmWeight : 54gColor: BlackSpray Bottle Description:Made of pure natural Citronella essential oil, without CFC.Environmentally friendly formula. Safe not harmful to you or your beloved dogs.Spray refill in citronella scent helps deter dogs from barking.Close the spray dog collar. Then need to aim at the inflation port and press down forcefully, hold for about 15 seconds, then the gas can be filled successfully.Will work with all Aerosol based barking collars (not cartridge ones)Specifications: weight 3 oz (85g)Tips of usage:To get the best experience of this collar on your dog, adjust the collar so that its not too tight or too loose, spare 1-2 inches for your friend to grow.For LONG-HAIRED dogs, please cut off some of the hair under your dog's neck to ensure that the bark collar detects throat vibrations.Note:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 0-2cm measuring deviation due to manual measurement. ( 1 inch = 2.54 cm )NOTE:PO BOX address is not supported, please provide the correct physical addressATTENTION:If the customer change their mind and want to cancel the order, please contact us within 2-3 hours after placing the order. Or, once the package is dispatched, we won't be able to intercept packages in transit. Please understand.Refund note: Only return the product cost, not refund the freight!!!