Releases a short burst of citronella spray as soon as your dog barks! Fully filled collar holds enough for 15 sprays. Four modes of operation: Start + Stop + Mist Spray + Recharging. Lightweight receiver, unique patented bark terminator, rechargeable battery. LED indicator with low power alarm. Water resistant. Adjustable mist spraying amount. Suitable for most dogs between 10kg and 30kg and over 6 months old.