HDBaseT 4K UHD Extender Set with 2-Way IR, RS-232 and PoH (4K to 35m/114ft - 1080p to 70m/230ft)

Part Number EX-35-4K

EX-35-4K Extender Set
EX-35-4K ReceiverEX-35-4K ReceiverEX-35-4K TransmitterEX-35-4K Transmitter3 Year Parts and Labour Warranty


With performance and affordability in mind, the EX-35-4K extender set offers HDMI over class B HDBaseT distribution of 4K UltraHD and 1080p video, audio, bidirectional IR and RS-232 pass-through, remote power over medium/long distances (PoH) within an incredibly low profile chassis of just 15mm.

  • Transmits 4K UHD 4:2:0 60Hz | 4K UHD 4:2:0 10-bit 24Hz to 35m/115ft and 1080p to 70m/230ft
  • Passes digital audio up to Dolby Atmos or DTS:X
  • HDCP 2.2 compatibility
  • Super low-profile 15mm housing and TX to RX PoH for discreet placement behind displays
  • Bidirectional IR and RS-232 pass-through, internal handling of EDID, CEC pass-through

NOTE: this product is in the process of phasing out with limited stock availability.  Model replaced by EX-35-H2


Featuring powerful, yet cost-effective Class B HDBaseT technology, the EX-35-4K supports distribution of 1080p@60Hz with 36bit deep color to 70m/230ft and 4K UltraHD to 35m/115ft with HDCP 2.2 for compatibility with the latest 4K UHD content, sources and displays.  
The EX-35-4K also supports HD audio up to Dolby Atmos or DTS:X, 100w PoH remote power from transmitter to receiver, bidirectional IR and RS-232 pass-through, internal handling of EDID and CEC pass-through - all along a single Cat5e/6 cable. 
The switchable RS-232 port selector on both the transmitter and receiver also allows for firmware updates. 18v power connectivity is offered via a threaded DC power port for standard and locking DC power plugs. 
Transmission and operational status is indicated with front panel LEDs:  Power, signal status for established display connection, HDCP presence in the signal, and HDBaseT link indicator that allows the strength of transmission between source and display to be confirmed.
WyreStorm 4K UltraHD HDBaseT solutions offer the flexibility and compatibility demanded in today's wide range of applications. Combining ease of use, reliability and cost-efficiency WyreStorm is the top choice for residential or commercial integrators world-wide. 


  • 4K UltraHD extender set capable of transmitting AV content over long distances using single cable Cat5e/6 cable
  • Full UHD 4K transmission support within the 10.2Gbs spectrum of HDMI 1.4 standard
  • Transmits discreet wide-band two-way IR control signal / serial control commands together within HDMI signal over a single Cat5e/6
  • Low profile chassis of 15mm / 0.6” for easier, more convenient installations behind screens at display zones. 
  • One-way PoH (Power over HDBaseT) locally powered 18v DC transmitter passes power along the Cat5e/6 to remotely power the receiver (no power required at display)
  • Multichannel HD audio supports 7.1 DTS Master HD and Dolby True HD 
  • Robust Class B HDBaseT transmission technology for stable distribution and control resistant to electrostatic and environmental interference compared to conventional UTP transmission. 
  • Supports all high definition resolutions: 4K UHD @30Hz 4:4:4 24bit, 4K UHD @60Hz 4:2:0 24bit (See Specifications tab)
  • Full 3D compatibility up to 1080p - frame packing/sequential (Blu-ray) and interlaced stereoscopic (satellite/ cable broadcasts) 
  • Switchable RS-232 function mode on transmitter and receiver for firmware update 

Note: Serial control via RS-232 only supported when connected to a compatible HDBaseT transmission device with routable RS-232. 

  • Threaded bushings on allow use of both standard and locking 18v DC power plugs 
  • Visual LED indication for power supply to units, signal status to show established display connection, HDCP presence in signal and HDBaseT link between devices
  • Cable termination follows IEEE-568B standards 
  • Automatically adjusts feedback, equalization and amplification of signal for easy installation 
  • Energy efficient universal power supply included 

In the Box

1 x TX-35-4K Transmitter 

1 x RX-35-4K Receiver 

1 x 18V/1Amp DC universal power supply (additional PSU sold separately)

2 x 3.5mm Phoenix male connector (3 pin) 

2 x Wide-band IR Emitter 

2 x Wide-band IR Receiver (30-50KHz) 

2 x Pairs of EX-35-4K mounting brackets 

1 x Quickstart guide (Quickstart and full user manual downloadable from this product page)


109mm × 15mm × 64mm / 4.3” x 0.59” x 2.5” (depth excludes connectors)
170g/5.99oz (each unit)
32°F to 95°F (0°C to 35°C) 10% to 90%, non-condensing
-4°F to 140°F (-20°C to 70°C) 10% to 90%, non-condensing
0.5 - 1.2V p-p
5 volts p-p (TTL)
2160p@30Hz/24bit (4K) | 1080p@60Hz/36bit Deep Color (HD)
4K: 35m (115ft) / 1080p: 70m (230ft)
1080p@60Hz 3D  up to 35m/115ft using Cat5/5e
1080p@60Hz 3D up to 40m/131ft using Cat6/6a
1080p@60Hz 36bit up to 60m/197ft using  Cat5/5e
1080p@60Hz 36bit up to 70m/230ft using Cat6/6a
4K@24/25/30Hz 4:4:4 24bit up to 70m/230ft using Cat6/6a
4K@60Hz 4:2:0 24bit up to 35m/115ft using Cat6/6a


Multichannel digital audio supporting DTS Master HD, Dolby True HD (mirrors source to output display)
18V DC 1A (for each power connector)
≤11W (Pair)

Input: Transmitter: 1 x HDMI IN  -  Receiver: 1 x HDBaseT 

Input Signal Type: Transmitter HDMI 1.4a with 4K  -  Receiver: HDBaseT 

Output: Transmitter: 1 x HDBaseT OUT Receiver: 1 x HDMI Out

Output Signal Type: Transmitter: HDBaseT Receiver: HDMI 1.4a with 4K

Video Impedance: 100Ω

Maximum Pixel Clock: 297MHz

3D: Frame packing/sequential (Blu-ray), Interlaced stereoscopic (satellite/cable broadcasts)

ESD Protection: ±8 kV (Air-gap discharge) ±4 kV (Contact discharge)

Surge Protection: IEC 61000-4-4 (EFT) 40A (5/50ns) IEC 61000-4-5 (Lightning) 25A (8/20μs)

Electrical Fast Transient/Burst: Data communication cord:1 kV Power cord : 2 kV

Certification: CE, FCC, RoHS, HDBaseT