If you’ve a pet dog you probably don’t want to even think about what might happen if it goes missing. Unfortunately, that happens to dogs around the world each and every day — and finding them can be difficult. That’s why devices like this Halo GPS dog collar are so great, because they help reunite pet lovers with their dogs. And now you can put one around your dog’s neck for just $649 today.

That price represents a solid $50 saving and all you have to do is make sure to enter the coupon code HALO-WEEN when checking out. That code is live and functional right now, but it won’t hang around for long. Halo tells us that the code will stop working on Oct. 31 at 11:59 pm CST. Make sure to get your order in before that happens if you want to take advantage of this deal.

The latest Halo collar is the most accurate Halo yet thanks to improved dog geofencing. That means that you’ll enjoy real-time tracking of your pet while Halo’s AI-driven software uses machine learning to ensure more accurate tracking. The whole thing is waterproof and charges via a magnetic charger — once charged, it’ll ruin for a full day before it needs to be topped up.

You’ll of course be able to see exactly where your dog is using the Halo phone app, and you can set up virtual fences so that you’ll always know exactly what they’re up to.

Buyers of the Halo collar can choose from one of four colors and there are different sizes available to make sure that you can find the right fit for your dog. You’ll need to set up a Halo subscription to use the collar features, with prices starting from $5.99 per month for the basic plan. But can you really put a price on peace of mind?