This CAT5/6 Transmitter (Receiver sold sepertly) is designed on HDBaseT technology which allows full 3D at 1080p up to 330ft. The SB-6335T not only supports High Definition Video and Audio but also IR and RS232.
eBay
2 in 1 Bluetooth 5.4 Audio Receiver Transmitter AUX Wireless Audio Adapter Handsfree 3.5mm Jack for Car Earphones TV Speakers
Aliexpress UK
The Vintage RCA WHR120RS Stereo Infrared Wireless Headphones with Transmitter/Power are a classic audio accessory that offers line-of-sight transmission for an immersive listening experience. With a frequency range of 40 Hz to 10 Khz, these black headphones are compatible with universal brands and provide RCA audio outputs. The infrared wireless connectivity ensures freedom of movement while watching TV or listening to music. This product, manufactured in China, is a reliable choice for those looking for a stylish and functional audio solution with a retro touch.
eBay
eppfun Bluetooth 5.4 Audio Receiver Transmitter aptX-LL/HD/AD LC3 Auracast LE Audio Adapter 2 IN1 Wireless Stereo Music with Mic
Aliexpress UK
Multi-channel UHF PLL receiver and 2 mic transmitters. ACT infrared pairing of mics to receiver. The Q-Audio QWM 1960 can be connected to your DJ or PA setup using the balanced XLR outputs or unbalanced 1/4" jack output.
eBay
DC 3.7V-5.0V FM Radio Module 76-108MHz Adjustable FM Stereo Audio Transmitter Circuit Board Module Support Bluetooth Audio to FM
Aliexpress UK
CT-641 Transmitter. Extender Type :Transmitter. Data Link Protocol :HDBaseT, HDMI. Interfaces :1 x HDBaseT - RJ-45 female, 1 x HDMI female, 2 x IrDA - mini jack female. Features :2K resolution support, 4K resolution support, HDBaseT Lite technology, HDCP compliant.
eBay
Bluetooth 5.0 Audio Transmitter Digital to Analog Audio Converter Spdif Optical Fiber to 3.5MM Car kit Amplifier Speaker
Aliexpress UK
With no visible loss of video quality it is perfect for corporate and digital signage applications.
eBay
Bluetooth 5.0 Transmitter Receiver 2 in1 Jack Wireless Adapter 3.5mm Audio AUX Adapter For Car Audio Music Aux Handsfree Headset
Aliexpress UK
5PCS Infrared Transmitter Module IR Infrared Sensor With LED Indicate. Infrared center wavelength: about 850nm-940nm. Infrared emission angle: over 20 degrees. Arduino Module. Module size: 22mm × 28mm.
eBay
Bluetooth V2.1 Stereo Audio Adapter Dongle 30 Pin Bluetooth Audio Music Transmitter For Ipod Mini Ipod Classic Ipod Nano Touch
Aliexpress UK
Infrared combat Transmitter(supporting multi-player tank war). Upper hull. There is no necessity to open a case. We have the ability to handle any trouble of the tank and refitting. We provide all parts of the tank.
eBay
30 Pin Bluetooth Audio Transmitter for IPod Classic IPod Nano Touch Wireless Stereo Audio Adapter Bluetooth Dongle
Aliexpress UK
The IR Transmitter and Receiver Extends IR signal using a repeater also know as IR repeater kit. Item model number: Deluxe IR 1204 Repeater system. From the Infrared eye for a cable box or other set top box, to the Mini IR receiver.
eBay
Bluetooth 5.3 Transmitter Receiver Adapter Wireless Audio For Car Music Headphone Speaker 3.5mm Jack AUX Wireless Audio Adapter
Aliexpress UK