Basic Dog Training
Free online version of the manual that accompanies each electronic collar.
www.e-collars.com/basic-dog-training.html   Recreation: Pets: Dogs: Training  

DogWatch
Manufacturers outdoor and indoor electronic radio transmitted dog containment fences, training collars and bark controllers. Site includes dealer locations.
www.dogwatch.com/   Business: Consumer Goods and Services: Pet Supplies: Dogs  

DT Systems
Supplying electronic collars for stopping barking, for beeper location and for bird dog and remote training. Includes photographs and specifications.
www.dtsystems.com/   Shopping: Pets: Supplies: Electronic Products  

Trainingcollars-4less
Training Collars 4 Less - electronic dog training collars.
trainingcollars-4less.com   Shopping: Pets: Cats and Dogs: Collars, Leads and Harnesses: Dogs: Training