Product details:

The PT 10 dog device works with both the PRO 70 and PRO 550 handhelds allowing you to add more dog device collars to your pack. Train up to 6 dogs on 1 PRO 70 handheld or 3 dogs on 1 PRO 550 handheld (additional dog devices required) with a range of 1 mile, plus remote-operated LED beacon lights for low light conditions and built in BarkLimiter, activated on the dog device, for a quieter kennel.