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Add a second dog to your FieldTrainer 425X, SportHunter 825X, or SportTrainer 575/875
The SDR-AXF is the standard Add-A-Dog receiver collar for SportDOG’s 425X and 825X families. If you own a FieldTrainer 425X, SportHunter 825X, SportTrainer 875, or any of the compatible systems listed below, this is the collar that expands your system to a second or third dog without buying a new transmitter. It also serves as a direct replacement if your original collar receiver is lost or damaged.
The SDR-AXF pairs to your existing transmitter in minutes and gives you independent control of each dog from the same handheld. DryTek waterproofing makes it submersible to 25 feet — the same construction as the primary collar that came with your system. Rechargeable lithium-ion battery charges in 2 hours and lasts 40–60 hours per charge.
Compatible systems
| FieldTrainer 425X, 425XS, 425, 425S | SD-425X, SD-425XS, SD-425, SD-425S |
| SportHunter 825X, 825, 1225X, 1225, 1825X, 1825 | SD-825X, SD-825, SD-1225X, SD-1225, SD-1825X, SD-1825 |
| SportTrainer 575E, 875E, 1275E | SD-575E, SD-875E, SD-1275E |
| WetlandHunter 425X Camo, 425 Camo, 1825X Camo, 1825 Camo | SD-425XCAMO, SD-425CAMO, SD-1825XCAMO, SD-1825CAMO |
| ProHunter 2525 | SD-2525 |
| HoundHunter 3225 | SD-3225 |
| UplandHunter 1875 | SD-1875 |
Specs & features
| Waterproofing | DryTek — submersible to 25 feet |
| Battery | Rechargeable Li-ion — 2-hour charge, 40–60 hours per charge |
| Dog size | 8 lbs and up, neck sizes 5”–22” |
| Collar strap | 3/4” orange strap included |
| Low battery indicator | Yes |
| Charging | Docking station included |
Running the FieldTrainer 425XS Stubborn Dog system specifically? Use the SDR-AXS instead — it delivers the higher-output stimulation range that matches the 425XS base system.
Customer Reviews
- Love the ability to use one remote for 3 dogsBy:Lynne Wiesman
Because I have 3 deaf dogs, I needed a system that would work on all 3 with one remote for the 3 dogs to call back since I can't just yell out to them. So for those things, it's an awesome system. I'm concerned about the level of vibration which is very light because, with deaf dogs, I need stronger vibration but if I have to, I'll switch over to a mild shock if needed. Also, I am usually pretty adept at setting up anything technical but the documentation on this was so confusing. I finally had to call in and she was so very helpful and got it set up so quickly!! (10/19/2021)- Works as DesignedBy:H. A. (Butch) Charlton
Works well with the master unit. No issues at all. Receiver could hold its charge a bit longer. (3/21/2017)- Good ProductBy:H A (Butch) Charlton
Works as advertised. (3/4/2017)
