Put your dog on the mark every time with the help of this waterproof, rechargeable SportDOG BrandA(R) SportHunterA(R) 825X. The 825X model uses the smallest collar of the family, while still providing a versatile and expandable system. From the big, wide open prairie to thick northern alder swamps, you can reinforce commands and correct misbehavior from up to half a mile away. Use the remote transmitter to safely choose from 21 stimulation levels, each with medium and high stim ranges. And it's expandable for use with 3 dogs (with purchase of Add-A-DogA(R) collars), giving you control and flexibility at your fingertips. 4 stimulation types for every dog and every situation CONTINUOUS: You control when/how long stimulation is delivered, up to 10 seconds max. After 10 seconds, the static stimulation "times out" for 5 seconds. Press the Transmitter button again to deliver additional stimulation after the time-out. MOMENTARY (NICK): Delivers static stimulation for 1/10 of a second, regardless of how long the button is pressed. TONE: When pressed, Collar Receiver makes a rapid beeping noise. VIBRATION: When pressed, Collar Receiver vibrates up to 10 seconds max. After 10 seconds, it "times out" for 5 seconds. The Transmitter button needs to be released, then pressed again to deliver additional stimulation. Designed for ease-of-use and no-look operation Reinforce commands and correct misbehavior from up to 1/2-mile away DryTekA(R) waterproof/submersible system down to 25' Up to 21 levels of static stimulation with medium/high ranges, plus tone and vibration Easily expandable to 3 dogs by adding SportDOG Add-A-DogA(R) collars (sold separately) Includes rechargeable lithium-ion battery packs with 2-hr. charge time Safe and effective for dogs 8 lbs. and heavier with neck sizes from 5-22"System Includes: Remote Transmitter with Removable Antenna Receiver on 3/4" Collar Strap Lanyard Standard Contact Points Long Contact Points C