The ZeroNoise Pit-Link Phone Headset connects directly to a smart phone using a USB-C plug, which in turn connects to the ZeroNoise Pit-Link Amplifier, enabling pit to car / kart communication. As the phone call reaches the amplifier the connection from car / kart to pit is on.
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Godox MoveLink Mini LT UC Wireless Microphone 2.4GHz Transmitter Receiver Lavalier Mic for iPhone Type-C Smartphone DSLR Camera
Aliexpress UK
USB PLUG: light wearing experience, plug and play, no need to drive, easy to use. BUILT IN HD MICROPHONE: It can be twisted at will to make your voice loud and clear. The noise is smaller and the sound is clearer.
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3.5mm TRS Male to Male Coiled Mic Cord Right Angle Connection Line Microphones Phone Camera Adapters Cable for Rode SC2
Aliexpress UK
Hands Free Call and High Quality Sound:The bluetooth earpiece adopts the bluetooth 5.3 chip technology, which provides more clear sound and stable connection, allowing you to hear crystal clear calls like you are communicating face to face with others.
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BOYA K11 Wireless Bluetooth Karaoke Microphone Portable Handheld Mic Speaker Machine Home Party Birthday Home KTV for Smartphone
Aliexpress UK
Model: OY359. Multi purpose, wide compatibility, the headset can be used for chatting, listening to music, and suitable for 2000 7 8 10 XP, for Vista. The built‑in unidirectional microphone can be bent arbitrarily to make your voice clear, and can reduce noise, so that the call can be unimpeded.
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COMICA Revo S Cardioid Wireless Interview Microphone for Smartphone 48kHz/24bit Noise Reduction Outdoor Interview Microphone
Aliexpress UK
Model: OY359. Multi purpose, wide compatibility, the headset can be used for chatting, listening to music, and suitable for 2000 7 8 10 XP, for Vista. The built‑in unidirectional microphone can be bent arbitrarily to make your voice clear, and can reduce noise, so that the call can be unimpeded.
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MAONO T1mini Wireless Lav Mic for Phone-Noise Cancelling, Auto Clipping, App Control Clip-on Microphone for Video Recording,Vlog
Aliexpress UK
Model: OY359. Multi purpose, wide compatibility, the headset can be used for chatting, listening to music, and suitable for 2000 7 8 10 XP, for Vista. The built‑in unidirectional microphone can be bent arbitrarily to make your voice clear, and can reduce noise, so that the call can be unimpeded.
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Lavalier Microphone 2.4G Wireless Portable Audio Video Recording Mini Mic for iPhone Android Live Broadcast Gaming Phone
Aliexpress UK
Type: Handsfree Headset. Model: Nokia HS-82. Colour : Black. Product Details.
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8-Channel UHF Professional Wireless Microphone System Headphone Condenser Microphone for Stage Performance DJ Party Outdoor MIC
Aliexpress UK
Hands Free Call and High Quality Sound:The bluetooth earpiece adopts the bluetooth 5.3 chip technology, which provides more clear sound and stable connection, allowing you to hear crystal clear calls like you are communicating face to face with others.
eBay
For DJI MIC mini Wireless Microphone Mobile phone connector Type-C Adapter High-Quality Audio With Stable Transmission
Aliexpress UK