• Compatible with High Tech Power Pet Electronic Pet Doors
  • Batteries last around 3 months, powered by B3V1A batteries
  • Adjustable collar range: 1" to 24"
  • Programmable operation range: 1' to 10' (adjustable for inside and outside separately)
  • Waterproof and durable
  • This is the MS-5 model which replaced the MS-4 model that is discontinued

High Tech Power Pet Ultrasonic Pet Collars

Directional Ultrasonic Sensing for Quick Door Access

Regular price $157.00

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Featuring directional ultrasonic technology and a rugged waterproof housing, this lightweight collar key grants hands-free access to your High Tech Power Pet door while preventing accidental triggers when your pet is resting nearby.

  • Compatible with High Tech Power Pet Electronic Pet Doors
  • Batteries last around 3 months, powered by B3V1A batteries
  • Adjustable collar range: 1" to 24"
  • Programmable operation range: 1' to 10' (adjustable for inside and outside separately)
  • Waterproof and durable
  • This is the MS-5 model which replaced the MS-4 model that is discontinued

Installation & Fit

  • Threads onto the included nylon strap or slides onto existing collar straps up to 1" wide via integrated casing loops.
  • Uses a single B3V1A 3V battery installed through a water-sealed, twist-lock compartment on the rear of the casing.
  • Operates via directional ultrasonic frequency with zero electronic pairing or software sync required.
  • Signal distance is calibrated directly at the main pet door control panel rather than on the collar key itself.
  • Direct drop-in replacement for discontinued MS-4 and MS-2 keys, compatible with all High Tech Power Pet models (PX-1, PX-2, PXR Series, and Patio Sliders).
  • Instant, tool-free DIY deployment out of the box.

Best Suited For

Ideal for:

  • Custom Distance Control: Fine-tuning activation ranges from 1' to 10' (with independent indoor and outdoor settings) to eliminate accidental door triggers when your pet rests or walks nearby indoors.
  • Owners of High Tech Power Pet Electronic Doors needing additional collar keys for multi-pet homes or replacing lost or discontinued MS-4 keys.
  • Active pets who play outdoors or swim, thanks to the rugged, fully waterproof housing.
  • Pets of virtually any size, featuring a lightweight casing (2"w x 1"h x 3/8"d) and an adjustable neck strap fitting 1" to 24".

Questions

How do I measure my old flap to order the right replacement size?

Measure the flap panel itself, not the hole it covers and not the outside of the frame. Take the width across the flap at its widest point, then the height from the top edge, including the section that sits under the retainer, down to the bottom edge.

Then count the holes along the top edge and measure the distance between the centers of the two outermost holes. Flap dimensions repeat across brands but hole patterns do not, so that spacing is usually what tells us which flap is actually yours. The size guide on the product page lists the flap dimensions for each size we carry, so you can check your measurements against it before ordering.

Can I buy just one flap for a double flap pet door?

Yes. On a double flap door the two flaps are separate parts, so you can replace one and leave the other in place. That is common, because the exterior flap takes the weather and the UV and usually wears out first.

Order the same size as your door and tell us which side you need if the two differ. If both flaps are the same age it is worth replacing them together. A new flap sits against the frame more tightly than a relaxed older one, and mixing the two can leave the seal uneven.

Does a replacement flap come with magnets and hardware, or just the flap?

Our replacement flap kits arrive ready to install. The flap ships with the parts needed to fit it to your door, so you are not sourcing magnets, rivets or retaining strips separately.

If you would like to add extra magnets for a firmer close, those are available separately as well.

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Product Details

Product Details


The High Tech Pet MS-5 Ultrasonic Collar Key delivers reliable, hands-free entry for your pet while keeping your High Tech Power Pet Automatic Door securely locked against unwanted visitors. Engineered with a durable, waterproof housing and customizable signal range controls, it offers safe and tailored access for pets of all sizes.

Durable & Lightweight Design
Measuring just 2"w x 1"h x 3/8"d, the compact MS-5 casing attaches comfortably to your pet's collar without causing neck strain. The fully waterproof enclosure withstands heavy moisture and active outdoor play, providing a rugged, long-lasting upgrade over the discontinued MS-4 model.

Independent Signal Range Control
Directional ultrasonic technology allows you to customize activation distances from 1' to 10' independently for inside and outside entry zones. This precise control prevents accidental door openings when your pet is resting nearby indoors while ensuring immediate access when approaching from the outside.

Technical Specifications & Features:

  • Power System: Powered by an easily replaceable B3V1A battery delivering approximately 3 months of continuous operation.
  • Universal Neck Sizing: Includes an adjustable collar strap fitting neck sizes from 1" to 24".
  • Seamless Compatibility: Compatible with all High Tech Power Pet models, including the Power Pet Automatic Patio Pet Door and standard Power Pet Automatic Pet Doors.

Explore our complete selection of electronic pet door collar keys to find replacement options for other makes and models.

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