Ulanzi A21 Wireless Microphone

The Ulanzi A21 Wireless Microphone is a compact powerhouse designed to elevate your audio recordings with premium wireless freedom, crisp clarity, and effortless performance. Perfect for vloggers, interviewers, livestreamers, mobile creators, and event hosts, this miniature wireless mic system delivers immersive 360° omnidirectional sound that captures rich voice details while minimizing background noise — plus AI-driven noise reduction for clearer, distraction-free captures. With its button-sized transmitters, lightweight form factor, and plug-and-play connectivity via 2.4 GHz wireless, you can record high-quality audio up to 100 m away from your device without tangled cables. Each transmitter offers up to 6 hours of runtime, and the included charging case extends total use to about 30 hours for long shooting days. Whether shooting outdoors, recording interviews, or creating dynamic content on the move, the Ulanzi A21 brings professional-grade wireless audio to your projects without complication.

Specifications

Audio Performance:

• Polar Pattern: 360° omnidirectional for full-range capture

• Sampling Rate / Bit Depth: 32 kHz / 24-bit high-resolution audio

• Signal-to-Noise Ratio (SNR): >58 dB clean sound performance

• Frequency Response: 20 Hz – 20 kHz natural range

Wireless Connectivity:

• Wireless Frequency: 2.4 GHz stable digital transmission

• Operating Range: Up to ~100 m in open space

• Latency: Low latency for real-time capture

Battery & Power:

• Transmitter Runtime: ~6 hours per mic

• Charging Case Total Runtime: ~30 hours (multiple recharges)

• Charging Time: ~1.5-2 hours

Physical Details:

• Transmitter Weight: ~8 g ultra-light

• Transmitter Dimensions: ~28 × 26 × 13 mm

• Charging Case Weight: ~49 g

• Charging Case Dimensions: ~93 × 38 × 32 mm

In the Box:

• Two transmitters

• One wireless receiver

• Charging case

• Two wind muff covers

• Clips, magnets, and cords

• USB-C charging cable

• User guide

Frequently Asked Questions (FAQ)

Q1: What devices work with the Ulanzi A21 Wireless Microphone?
A1: The Ulanzi A21 Wireless Microphone system connects wirelessly and works with many devices that support USB-C or Lightning receivers (with adapters or appropriate versions), improving audio on smartphones, tablets, cameras, and computers.

Q2: Do I need any app to use the Ulanzi A21 Wireless Microphone?
A2: No app is required. The Ulanzi A21 is a plug-and-play wireless mic that pairs automatically with the receiver for instant, hassle-free recording.

Q3: How far can the Ulanzi A21 Wireless Microphone transmit audio?
A3: It supports wireless transmission up to approximately 100 m in open space, giving creators flexibility during interviews, outdoor shoots, or live events.

Q4: How long does the battery last on each transmitter?
A4: Each transmitter delivers around 6 hours of continuous use, and the charging case can recharge the transmitters multiple times for about 30 hours total runtime.

Q5: Is the Ulanzi A21 suitable for vlogging and live streaming?
A5: Yes — with its 360° omnidirectional pickup, stable wireless signal, AI noise reduction, and extended battery life, the Ulanzi A21 Wireless Microphone is ideal for vlogs, live streams, interviews, and creative content capture on the go.