Review on Waterproof and Rechargeable SportDOG Brand FieldTrainer 425X/SportHunter 825 Add-A-Dog Collar with Tone, Vibration, and Static - Ideal for Replacement or Additional Remote Trainer Collar by Lisa Cummings

I had no problems connecting this fake collar to the Sport Dog model I already had. Easy to use remote control with two collars. I like that this one is orange and my original is black. It's good to have two different collars and orange makes my dog stand out more. I highly recommend this brand. I know there are cheaper options on the market, but you really do get what you pay for. It costs money. Our original is 2 years old and still works great, lasts for hours on a charge.