Ulanzi A21 Wireless Microphone

Ulanzi A21 Wireless Microphone

-Ultra Compact at 8g
-High-Fidelity 32kHz 24bit Transmission
-Smart Noice Reduction
-Wireless Range Upto 100M

💢Available both Type-C & Lighting Variant

What is the Ulanzi A21? A tiny wireless microphone for vloggers and live streamers.

The Ulanzi A21 is a dual wireless microphone system designed specifically for creators. It comes with two transmitters in one set, ideal for solo vlogging or interviewing two people simultaneously.

Its key features include its small, button-sized design and weight of just 8 grams, making it almost unnoticeable when attached to clothing. It comes with AI noise cancellation that filters out ambient noise, leaving only clear speech. It offers up to 30 hours of battery life including the charging case and has a range of up to 100 meters in open areas.

Suitable for whom / Not suitable for whom

✓ Suitable for

This is ideal for vloggers who need clear audio but don’t want the microphone obstructing the camera, live-streaming salespeople who need to speak for hours and require consistently crisp sound, content creators making interview videos or podcasts (in pairs), teachers or trainers running online courses, and journalists or documentary filmmakers who need to conduct field interviews.

✗ Not suitable for

This microphone is for iPhone users with Lightning ports (iPhone 14 and earlier models), as this model only has a Type-C connector. It’s also for those who need studio-quality microphones for large-scale productions and direct connection to DSLR/Mirrorless cameras (this model is primarily designed for mobile devices).

Suitable for what types of use / Not suitable for what types of use

✓ Works well

Ideal for outdoor vlogging (with included furry windscreen), live streaming sales for hours without battery drain, conducting 2-person interviews with dual microphones, creating online courses or recording podcasts, filming restaurant or product reviews in public places, and video calls or online meetings requiring clear audio.

✗ Not suitable for

Studio-quality music recording, applications requiring transmission distances exceeding 100 meters, and locations with significant 2.4GHz interference, such as large trade shows, are all examples of such applications.

Real-world experience from the UlanziThailand team.

“Our team has been testing the A21 for a while now. What impressed us most is how small and lightweight it is; you can almost forget you’re wearing it when it’s attached to your shirt. The AI ​​Noise Reduction works exceptionally well. When filming restaurant reviews in a very noisy environment, the surrounding noise was almost completely filtered out, leaving only clear speech. Another great feature is the ability to switch modes directly on the microphone without opening the app – very convenient.”

Key features from real-world use.

• Very small and lightweight – the transmitter weighs only 8 grams, about the size of a shirt button. You won’t even feel it when attached.
• AI Noise Reduction – Intelligent noise cancellation system filters out ambient noise, leaving only clear speech.
• 360-degree audio reception – no need to worry about microphone direction; you’ll be heard clearly no matter what angle you’re speaking from.
• Battery life up to 30 hours – Transmitter lasts 6 hours/unit, charging case provides 2 additional charges, for a total of 30 hours.
• Transmits signals up to 100 meters – uses stable 2.4GHz frequency, less prone to disconnection.
• Dual Mic Recording – Records the voices of two people simultaneously, ideal for interviews or podcasts.
• 4 sound modes – choose between Noise Reduction, Original, Reverb, and Mute. Switch between modes directly on the microphone.
• Instant Playback – Listen to recorded audio instantly on your mobile phone, no waiting required.
• Charge while recording – Plug in the Receiver charging cable while in use; no need to worry about the battery running out.

Specifications that Creators should know.

• Connector – Type-C (Compatible with iPhone 15 and later, and all Android devices with a Type-C port)
• Audio Quality – 32kHz / 24bit Sampling Rate, Signal-to-Noise Ratio greater than 58dB
• Transmission range – up to 100 meters in open areas (2.4GHz frequency).
• Transmitter dimensions – 28 x 26 x 13 mm. Weight – 8 grams.
• Charging case dimensions – 93 x 38 x 32 mm. Weight 49 grams.
• Battery – Transmitter 75mAh (6 hours/unit), Charging case 400mAh (charges twice)
• Charging time – 1.5-2 hours until fully charged.
• Polar Pattern – Omnidirectional 360°

Items received in the box

The package includes: 1 Receiver (Type-C), 2 Transmitters, 1 Charging Case, 2 Furry Windshields, 2 Neck Straps, 2 Clothing Clips, 2 Magnetic Lapel Clips, 1 USB-C Charging Cable, and an instruction manual.

Instructions and precautions

Frequently asked questions from Ulanzi users.

In summary: Is this model right for you?

Choose A21 if: You use an iPhone 15 or later, or an Android device with a Type-C port, and want a small, lightweight, easy-to-use, clear-sounding wireless microphone with built-in AI noise cancellation, long battery life, and an affordable price. It’s ideal for vloggers, live streamers, or content creators who need a quality microphone on a budget.

Consider a different model if: you use an iPhone with a Lightning port (iPhone 14 and earlier) or you need a microphone for large-scale production work requiring studio-quality sound.