We have two large dogs, a Great Dane and Great Pyrenees/ Lab mix
The collars cost us around $200 on eBay, and work really well. I did try it on my arm to see what the shock was like, it wasn't pleasent, but it didn't kill me....
http://i9.ebayimg.com/02/i/07/34/79/cf_1.JPG
INNOTEK IUT-1002 SHOCK CollarS 2 DOG Training
Innotek's revolutionary UltraSmart™ technology tells you when the training collar is properly fitted on your dog by producting an audible click. Never worry about the collar being too loose or too tight again. With its non-slip comfort grip and precision digital display it allows you to take confident control of your dog's training. The hand-held controller is more comfortable to hold in your right or left hand. A quick-touch holster offers you hands-free operation and convenience. The contoured, integrated collar is 30% thinner than other collar designs and a fraction of the weight. It is more comfortable for the dog, features fast-charging lithium ion batteries, and an improved watertight seal.
Exclusive Features:
Includes training collars for 2 Dogs
Tone-only training option
Programmable buttons: select momentary pulse or a +2 boost for countering high distractions plus 15 flexible training levels
Big Buttons - easy to feel controls mean added training confidence
½ mile range
ReadyTest™ ensures correct collar fit, checks battery status, and warns of potential problems for pet safety
Waterproof - Collar and transmitter stand up to rough punishment, even submerged in water
Visual display - Large LCD shows digital precision, accurately displays training levels. Backlight offers easy viewing even at night
Rechargeable Collar - Fast-charging, long life Lithium Ion Batteries (included)
Includes docking station for recharging
Limited Lifetime Warranty
For dogs 6 lbs. and over with neck size 8"-24"