Frequency response 20Hz - 20kHz. No limit to the amount of receivers you an link. Audio is simply connected to the transmitter via 3.5mm stereo jack and the system's supplied with a pair of in-ear headphones for connecting to the receiver.
eBay
UHF IEM Wireless In-Ear Monitoring System ER-102 with bluetooth5.0 for Stage
Aliexpress UK
Introducing the LEKATO MS-02 Wireless in Ear Monitor System. Experience the freedom and convenience of 2.4G Stereo Wireless IEM System. Perfect for studio recordings, band rehearsals, and live performances.
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Debra FR-102 UHF In-Ear Wireless Monitoring System Stage Performance With Multiple Transmitter For
Aliexpress UK
Stereo DAC output: 24bit operation Signal-to-noise ratio: ≥95db Wireless frequency: 2.4GHz Frequency range: 2.4GHz-2.48GHZ Transmission distance: ≤30 meters Headphone battery capacity: 70mAh Transmitter battery capacity: 150mAh Package Included： 1 pair earphone 1x Transmitter Note : the other accessories are not included
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SIKETEER PSM300 Wireless In-Ear Monitors Wireless 566-590MHz Monitoring System Stage Personal In-Ear
Aliexpress UK
Audio is connected to the transmitter via a 3.5mm stereo jack and the system is supplied with a pair of in-ear headphones to connect with the receiver. Supplied with in-ear monitoring headphones. PA & Live Sound.
eBay
UHF IEM In-Ear Monitor System Wireless Audio-Mini UHF Rechargeable for Music Audio Monitoring Live
Aliexpress UK
The system toggles between mono and stereo mode for perfect monitoring for live musicians, actors or speakers. Used but in full working order.
eBay
ST-mini Stereo UHF IEM Wireless In-Ear Monitor System Rechargeable for Audio Monitoring Recording
Aliexpress UK
Connecting theSPM-235 In-Ear Monitors is straightforward—simply plug them into the headphone socket on the amplifier for instant monitoring. Switchable mono/stereo operation for flexible monitoring.
eBay
UHF IEM In-Ear Monitoring Wireless System Singal Channel With Multiple Transmitter For Small
Aliexpress UK
The result is audio clarity that surpasses CD quality and is noticeably superior to MP3 formats. Beyond this, the system’s versatility shines in group settings. High-quality, ultra-compact wireless system for in-ear monitors.
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Debra Wireless In-Ear Monitor System UHF IEM Audio-Mini UHF Rechargeable for Music Audio Monitoring
Aliexpress UK
Wireless frequency: 2.4GHz. Stereo DAC output: 24bit operation. 1 pair earphone. Note : the other accessories are not included. 1x Transmitter. Frequency range: 2.4GHz-2.48GHZ.
eBay
Leicozic 500Mhz Professional Monitoring System PSM300 Stage Return Stereo Personal In Ear Monitor
Aliexpress UK