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SportDOG Brand FieldTrainer 425X/SportHunter 825 Add-A-Dog Collar-Additional, Replacement or Extra Collar for Your…

Amazon.com Price: $109.95 (as of 04/09/2023 00:33 PST- Details)

Collar Receiver only; expand your current system or replace an old collar
Compatible with the SportDOG Brand FieldTrainer 425X (SD-425X), 425 (SD-425), SportTrainer 575 (SD-575E), 875 (SD-875E), and SportHunter 825X (SD-825X), 825 (SD-825)
Waterproof and submersible to 25 feet using DryTek technology