There series products adopt UHF frequency and use the international standard common frequency which can be used in all over the world. Squelch circuit usually analysis the intensity of the RF frequency channel instead of the noise and the needed signal.
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Outdoor Bicycle TG392 Portable Bluetooth Speaker TWS Wireless Mini Bass FM Radio Soundbar Boombox Riding Music Play Loudspeaker
Aliexpress UK
The Mini Wireless Microphone is a compact and lightweight condenser microphone designed for home recording and streaming. It features a dynamic transducer type, omnidirectional polar pattern, and wireless connectivity technology with a frequency of 2.4 GHz. The microphone is suitable for use with iPhone and iPad devices, and comes with a transmitter, receiver, charging cable, and user manual. It has special features like a clip, battery indicator light, 1-touch recording, and mute function, making it a convenient and versatile tool for various recording and streaming needs.
eBay
Portable Subwoofer Bluetooth Speakers Outdoor Stereo Surround Waterproof Loudspeaker Wireless Sound Box Support FM Radio TF Card
Aliexpress UK
Each mic is large and solid with a nice weighted feel, high performances wireless handheld microphone. Includes transmitter with two handheld, high sensitivity, unidirectional, wireless cardioid microphones.
eBay
T&G TG506 Speakers Portable Mini Bluetooth-compatible Speaker Wireless Soundbar Outdoor HIFI Subwoofer Support TF Card Radio Aux
Aliexpress UK
Bring professional-grade performance to your events with this powerful 4-channel UHF wireless microphone system. Connectivity technology UHF, XLR. Compatible devices Audio Interface, Audio Mixer, Amplifier, Karaoke Machine, Speaker.
eBay
Portable Speaker Wireless Bluetooth-compatible Subwoofer Outdoor Waterproof Loudspeaker Stereo Surround Support FM RadioTF
Aliexpress UK
Supplied in a foam lined case. Each mic requires 2 x 1.5V AA batteries (not supplied). DJ's & Musicians. Foam lined, ABS carry case. All goods have a 1 year warranty manufacturers warranty (unless otherwise stated) with the exception of goods which are classed as “Consumables”.
eBay
Powerful TV Soundbar Wired and Wireless Bluetooth Speaker Stereo Home Cinema Sound System with FM Radio Music Center Sound Bar
Aliexpress UK
【Easy setup】 Easy to connect and play, easy to do without pairing. strong signal stability, the wireless microphone is compatible with karaoke machines, electric speakers, amplifiers, mixers and audio interfaces.
eBay
T&G TG337 Bluetooth Speaker Portable TWS Wireless Mini Bass Boombox LED Loudspeaker IPX7 Outdoor Music Player Support BT AUX FM
Aliexpress UK
Transmission range: The wireless microphone system can support up to 200 feet range, 50 compatible frequencies (4 X 50) on each channel for interference-free reception, theoretically support up to 50 receivers and 200 microphones.
eBay
Choice Lenovo K3 Pro Audio Player Loudspeaker 5.0 Portable Bluetooth Speaker Stereo Surround Wireless Bluetooth Speakers
Aliexpress UK
Choose from 100 UHF frequencies, with signal bands ranging from 538.1 to 597.8MHz. IR Pairing & Bluetooth Input: The wireless microphone system has an IR auto-matching function that searches for the best frequency.
eBay
A10 Wireless Bluetooth Speaker Small Steel Cannon Subwoofer Portable Mini Gift Card Bluetooth SpeakerColor
Aliexpress UK