Getting started
Select your installation method:

Door Installation

Glass Installation

Wall Installation
Door Installation Accessories



Required Accessories
Select the type of door you’re installing OnlyCat into:
Standard Wooden or uPVC Door → No additional accessories required.
Why do I need a Standard Mounting Adapter?
Installing OnlyCat in a metal door requires a slightly larger cutout to prevent interference. A standard mounting adapter is recommended to conceal any gaps.

Optional Accessories
Do I need USB-C Cable Extender?
OnlyCat requires a mains connection via USB-C (3M USB-C cable supplied). Select the distance between your OnlyCat device and your mains socket to see if an extension cable is needed.

The included 3 m USB-C cable is enough. No extender required.
Add a 1 m extension. The included 3 m cable plus this 1 m extension reaches 4 m.
Add a 2 m extension. Together with the included 3 m cable, this covers up to 5 m.
Use a 5 m extension or replace with a 5 m cable for longer distances.
Do I need a OnlyCat 10mm spacer?
Designed to create extra space underneath the device. This spacer moves the entire installation 10mm off the surface for access and use of the USB input.
This may be necessary if the installation is above an obstacle (skirting, raised panel etc).

Glass Installation Accessories

Required Accessories
Which Mounting Adapter do I need?
What is the diameter of your existing cut out?
A SureFlap Cat Flap Mounting Adaptor (fully compatible with OnlyCat). Fits typical 212-260 mm circular cutouts. Outer diameter: 285 mm.
For hole diameters between 260–300 mm, the following mounting adapters are compatible. Choose the one that best matches your preference:
OnlyCat is fully compatible with existing SureFlap cut-outs, allowing for a quick and easy swap-out.
All mounting adapters — except the Compact Mounting Adapter — are supplied as a pair: one for the inside of the installation and one for the outside. You only need to order a single adapter set per installation.
OnlyCat requires a cut-out with the diameter of 285mm
Optional Accessories
Do I need USB-C Cable Extender?
OnlyCat requires a mains connection via USB-C (3M USB-C cable supplied). Select the distance between your OnlyCat device and your mains socket to see if an extension cable is needed.

The included 3 m USB-C cable is enough. No extender required.
Add a 1 m extension. The included 3 m cable plus this 1 m extension reaches 4 m.
Add a 2 m extension. Together with the included 3 m cable, this covers up to 5 m.
Use a 5 m extension or replace with a 5 m cable for longer distances.
Do I need a OnlyCat 10mm spacer?
Designed to create extra space underneath the device. This spacer moves the entire installation 10mm off the surface for access and use of the USB input.
This may be necessary if the installation is above an obstacle (skirting, raised panel etc).

Wall Installation Accessories


Required Accessories
Tunnel extender quantity calculator
OnlyCat’s built-in tunnel is 70 mm. Each extender adds 50 mm. Use the calculator to find how many you need.


Optional Accessories
Do I need USB-C Cable Extender?
OnlyCat requires a mains connection via USB-C (3M USB-C cable supplied). Select the distance between your OnlyCat device and your mains socket to see if an extension cable is needed.

The included 3 m USB-C cable is enough. No extender required.
Add a 1 m extension. The included 3 m cable plus this 1 m extension reaches 4 m.
Add a 2 m extension. Together with the included 3 m cable, this covers up to 5 m.
Use a 5 m extension or replace with a 5 m cable for longer distances.
Do I need a OnlyCat 10mm spacer?
Designed to create extra space underneath the device. This spacer moves the entire installation 10mm off the surface for access and use of the USB input.
This may be necessary if the installation is above an obstacle (skirting, raised panel etc).

Stay connected. Feel relieved.
Learn more about the OnlyCat microchip cat flap with prey detection. App enabled, with video notifications, OnlyCat puts you in control and stops the delivery of unwanted gifts.