Currently, eufy does not sell individual training collars without remote control; however, there is a 2-pack dog training collar being sold on Amazon. With a 2-pack dog training collar, you can use one remote control to pair two dog training collars to train two dogs at the same time. Here is the link for your reference: https://www.amazon.com/dp/B09CKZNHJL/ref=emc_b_5_t?th=1

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