Citronella Bark Collar for Dogs [No Spray Refill] Spray Dog Training Collar, Anti Barking Training Collar with 5 Adjustable Sensitivity Beep Vibration Spray Bark Collar for L/M/S Citronella Dog Collar[Safer Humanized Settings] There are 5 main working modes of the bark collar, press M key to freely switch including beep, vibration and spray. 0 5 level adjustable sensitivity (0 level test mode) When the dog barking is detected, the collar will automatically start working according to the selected mode, More user friendly, safer and more effective than other collars (No remote) [Please note that this product has no separate spray mode!!!!] [Auto