Found this when I was searching for collars once. Sounds good. This company is the cheapest I could find in Australia. I haven't tried these but it may be worth a try. There is a cheaper one on their site if you have a waterproof area to put it.
Our Products »
Stop Dog Barking
+ click to enlarge
Petsafe Outdoor Ultrasonic Bark Control
Was:</B> $199.00
Special Price: $182.50 Stock: available
Qty:
Features:
- Great for Neighbours' Barking Dogs
- It picks up barking dogs within a 15 metre range
- Can be used for neighbour’s barking dogs
- 3 levels of sensitivity
- 4 modes of operation
- Designed for outdoor use, the unit is both waterproof and durable
- Battery indicator has 2 colour display to show good and low status
The PetSafe Outdoor Ultrasonic Bark Control device is great for
stopping barking dogs, yours or neighbours. The sensitivity settings allow you to control the level of barking intensity to generate a ultrasonic correction. The low setting gives a range of 5 metres, the medium setting a range of 10 metres and the high setting reaches 15 metres. Thanks to its durable and waterproof design allows the PetSafe Outdoor Ultrasonic Bark Control device to be placed out in the weather. It comes with a hanging bracket already in place for use on a fence or in a tree.
Position the PetSafe Outdoor Ultrasonic Bark Control device so that its range covers the barking dogs. The internal microphone will pick up the sounds of the barking and is automatically activated. Once activated, the device will emit its ultrasonic sound. This sound is heard by dogs but not by us. The sound does not harm dogs, but simply startles them with the unpleasant sound. The dog quickly identifies this noise with his barking and this should stop the dog barking. The PetSafe Outdoor Ultrasonic Bark Control offers 3 levels of sensitivity to set the barking intensity or range for correction. The device also comes with a Test Mode.
Directions for Use: Simply place the PetSafe Outdoor Ultrasomnic Bark Control device facing the general direction of the dogs and adjust the sensitivity settings accordingly. For the best results, ensure that there are no large solid objects between the PetSafe Outdoor Ultrasonic Bark Control device and the barking dogs.