SONOFF USB 2.0 Extension Cable 1.5m – For Zigbee or Z-Wave Dongle

Your Zigbee dongle deserves a better place than behind your Smart Home Server.

A USB dongle plugged directly into the back of a computer is often located in a cabinet or surrounded by other electronics. The result: degraded signal transmission and a smaller Zigbee range. The SONOFF USB 2.0 extension cable of 1.5 meters gives you the freedom to position your dongle in the optimal spot – free from obstacles, with maximum range.

🔌 Pure copper for interference-free data transmission

• Anti-interference (EMI shielding) – no interference from other USB devices
• Ferrite core (magnetic ring) – filters high-frequency interference from the signal
• Lossless data transmission – no distortion over the full 1.5 meters
• Anti-oxidation – long lifespan with continuous use

📡 Why is distance better between a USB Dongle and a Smart Home Server?

USB dongles like the SONOFF ZBDongle-P or ZBDongle-E are susceptible to USB 3.0 interference. Modern computers and USB hubs emit noise at 2.4GHz – exactly the same frequency as Zigbee. By placing your dongle in a better position (away from USB 3.0 ports), you completely eliminate this problem and immediately improve the range.

🔗 Ideal combination with

• SONOFF ZBDongle-P – Zigbee coordinator (CC2652P)
• SONOFF ZBDongle-E – Zigbee coordinator (EFR32MG21)
• All other Zigbee-, Z-Wave- or Bluetooth USB sticks
• Home Assistant Raspberry Pi / mini-PC setup
• iHost with USB expansion

📦 Technical Specifications

⚠️ Point of attention

This cable is a USB 2.0 extension cable and is not suitable for USB 3.0 speeds. For use with Zigbee and Z-Wave dongles, USB 2.0 is always sufficient.

❓ Frequently Asked Questions (FAQ)

Why do I need an extension cable with my Zigbee dongle?
USB 3.0 ports and devices emit noise at 2.4GHz – exactly the Zigbee frequency. By placing your dongle 1.5 meters away with this extension cable, that interference almost completely disappears and your Zigbee reception significantly improves.

Can I connect the extension cable to a USB 3.0 port?
Yes, and it certainly helps! The physical distance that the cable creates is the key – the noise from the USB 3.0 port spreads as a short-range field and virtually disappears at 1.5 meters distance. For the best result, use a USB 2.0 port (e.g., the black ports on a Raspberry Pi 4), but even on a USB 3.0 port, the improvement compared to direct plugging is enormous.

Does this cable also work with Z-Wave USB dongles?
Yes, the cable works with any standard USB-A dongle, including Z-Wave sticks.

Does this cable also work with Z-Wave USB dongles?
Yes, the cable works with any standard USB-A dongle.

Is USB 2.0 fast enough for Zigbee?
More than enough – Zigbee requires minimal bandwidth that USB 2.0 can easily handle.

Does the cable fit all computers?
Yes, the standard USB-A Male/Female connector fits almost all computers, laptops, NAS systems, and USB hubs.

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