Window Jumper cable NS-WJ-05: the essential no-drill accessory for mobile signal boosters

A reliable mobile signal is essential for non-stop calls and fast data. Yet, many homes and offices struggle with weak indoor reception due to thick walls, double glazing, or building restrictions that prevent drilling. The Window Jumper cable is the expert solution that offers a damage-free way to connect external antennas to your signal booster indoors.

What is a Window Jumper cable?

A Window Jumper cable is a revolutionary, ultra-thin, flat coaxial cable that passes through the tiny gap of a closed window or door frame. Unlike standard cables that require drilling, this solution allows you to create a perfect, weather-resistant connection between an external antenna, which captures stronger outdoor signals, and your internal mobile signal booster or 5G router, without any modifications to your property. A Window Jumper cable is ideal for:

• Rental properties
• Listed buildings
• Flats and offices where drilling is not permitted
• Temporary setups like trade shows and events
• Easy DIY installations
• Emergency communication systems
• IoT devices that rely on cellular connectivity

Why do you need a Window Jumper cable?

A Window Jumper cable is a smart solution for improving your mobile wireless performance for the following reasons:

• It combats weak mobile signal & slow data
  Many people still experience unreliable mobile connections that affect calls, texts, and internet use. An external antenna can capture weak signals, and a Window Jumper cable ensures it can reach your indoor device.
• It’s perfect for rental properties & listed buildings
  If you live in a rented property or a historically listed building, drilling holes is often prohibited. A Window Jumper cable provides a non-invasive way to install an external antenna and booster, respecting property rules while achieving optimal mobile signal.
• It offers aesthetics & simplicity
  A Window Jumper cable helps avoid messy cables, visible holes, and complex installations. Its flat design is discreet and maintains the integrity and appearance of your home or office. It’s a clean, DIY solution.
• It’s a cost-effective option
  Instead of unreliable Wi-Fi calling or expensive network upgrades, a Window Jumper cable creates a robust signal boosting solution and offers an improvement to your mobile experiences.
• It provides ultra-low signal loss
  It helps maintain high signal strength, with a loss of only 0.435 dB at 900 MHz and 0.62 dB at 1800 MHz over a working length of 260 mm.
• It’s quickly installed
  A Window Jumper cable allows users to set up a booster system in under an hour, with no need for specialist tools or skills.
• It’s durable and weatherproof with the Ingress Protection Code is IP55.

How does the Window Jumper cable work?

• Connect the outdoor antenna to one end of the Window Jumper cable outside your property.

• Pass the flat cable section through the window frame and close the window fully without damaging the cable.

• Connect the indoor end to your signal booster unit.

The cable’s ultra-thin, reinforced design ensures the window can close tightly, preventing drafts and maintaining security. Its low-loss construction also ensures your booster receives the maximum possible signal from the outdoor antenna and improves indoor coverage.

Key features and benefits of our Window Jumper cables

When selecting a Window Jumper cable, quality matters. We engineer our products in a way that delivers great performance and long-term durability:

• Ultra-thin, flexible design
  Our Window Jumper cables fit seamlessly through window and door seals without affecting their integrity or weatherproofing.
• Minimal signal loss
  We construct Window Jumper cables using high-quality coaxial material—typically 50 Ohm impedance, standard for mobile communication systems—to ensure very low signal loss and preserve the strength of the captured outdoor signal.
• Durable & weather-resistant
  Our professionals build Window Jumper cables to be able to withstand weather conditions, featuring robust connectors and a protective outer sheath for long-term reliability.
• Universal compatibility
  MyAmplifiers.com’s cables are equipped with standard SMA /N-Type connectors, to ensure broad compatibility with most external antennas, mobile signal boosters, and 5G/4G routers available in the market.
• Effortless installation
  No special tools or professional help required to install a Window Jumper cable. Simply position, connect, and close the window—it’s genuinely a DIY solution.

Choosing the right Window Jumper cable

To ensure optimal performance for your mobile wireless setup, consider these factors:

• Cable length
  While the Window Jumper cable itself is short, ensure it's long enough to bridge the connection comfortably without strain.
• Impedance
  For mobile signal solutions, a 50 Ohm impedance cable is standard and highly recommended for minimal signal loss.
• Build quality
  Look for durable, weather-resistant materials to ensure longevity, especially in the variable climate.

Our Window Jumper cables are fully compatible with these requirements.

Window Jumper Cable NS-WJ-05

The Window Jumper Cable is a very thin, low-loss RF coaxial cable designed to pass through window frames without drilling which makes it perfect for rental properties or protected buildings.

€10

Trusted by customers

The Window Jumper cable is an essential component for any indoor signal boosting system where no-drill installation is required. It allows you to bring a strong outdoor signal indoors quickly, easily, and safely, without destroying the structure of your building or violating lease agreements.