Get ready to experience the all-new redesigned Halo Collar 4 with dual-frequency GPS technology! This powerful dog collar lets you create virtual fences anywhere with ease using the Halo app, halo collar 4 keeping your pet safe and free to explore in all weather conditions. Whether you’re by the lake, in the snow, or at home, Halo Collar 4 provides unmatched security and fun for your dog. See why dogs get excited for outdoor adventures with Halo.