Gladsmile ZF550 GPS Wireless Dog Fence with Custom and Circular Boundaries

For dog owners who want an outdoor boundary without burying wire, the Gladsmile ZF550 GPS wireless dog fence offers a portable way to set up a containment area. It is designed for dogs weighing 15–120 lb and is not intended for small dogs.

Choose a custom boundary to follow an irregular yard or a circular boundary for a straightforward setup. The two modes address different outdoor layouts, so you can select the one that fits your dog's activity area.

For a yard, farm, or temporary outdoor space, the GPS collar combines adjustable boundary settings with sound, vibration, and static correction modes. Its rechargeable design also makes it useful for travel and camping.

Everyday use

Set the boundary for the outdoor area where your dog spends time, then use the collar’s beep, vibration, or static correction settings as part of boundary training. Beep levels run from 1–5, while vibration and static correction each have levels 0–9. The manufacturer recommends starting with sound or vibration and increasing levels gradually if needed.

For example, the system can be set up for a dog exploring a yard while you work outdoors nearby. Since the fence is GPS-based and does not require buried wires, it can also suit a temporary space where a wired installation would be impractical. The collar’s adjustable length reaches up to 28 inches, and its IPX7 waterproof protection supports outdoor use in rain or wet grass.

Where it shines

The choice between custom and circular boundaries is useful when the shape of the area matters. Custom Fence Mode can be used for irregular yards or terrain, while Circular Fence Mode offers a simpler boundary shape. The system supports an adjustable range from 49 ft to 6,561 ft, letting you set coverage to suit the outdoor area. Only one boundary mode can be selected at a time.

Because the system is portable, it can be used in different outdoor settings, including a farm, yard, or campsite. Its automatic memory saves the last center point and settings, helping avoid a full setup each time it is powered on. If you move the training area, reset the parameters before use.

What matters most

The three correction options let you choose an approach for boundary training: beep, vibration, or static correction. Their adjustable levels provide settings to work with, while the automatic memory retains the last center point and configuration for regular use. The collar is rechargeable and provides up to 40 hours of runtime per charge, according to the product details.

This is a different approach from a fence that relies on buried wire: the Gladsmile uses GPS and offers custom or circular boundary modes in a portable system. That makes it practical for owners who want to define an outdoor area without installing a wired perimeter, whether the space is a permanent yard or a temporary stop during travel.

What to clarify

Can the custom and circular boundaries run at the same time? No. Choose one mode according to the shape of your dog's activity area.

Which mode works for an irregular yard? Custom Fence Mode is intended to fit irregular yards or terrain. Circular Fence Mode is the alternative for a circular boundary.

How long does the rechargeable collar run per charge? The listed runtime is up to 40 hours per charge. Actual use may vary with conditions.

Is it worth it?

The Gladsmile ZF550 brings GPS boundary setup, two layout modes, three adjustable correction options, and a waterproof rechargeable collar into one portable outdoor system. It is a practical fit for owners of dogs within its stated weight range who want flexible containment for a yard, farm, or temporary outdoor area without burying wire.