Ulanzi A21 Button Wireless Lavalier Microphone

    Key Specifications

• Brand / Model: Ulanzi A21

• Microphone Type: Wireless Lavalier (button-sized)

• Polar Pattern: Omnidirectional (360° sound pickup) 

• Wireless Technology: 2.4GHz digital transmission 

• Transmission Range:

  • Up to 30 m (typical use) 

  • Up to 100 m (open space) 

• Frequency Response: 20Hz – 20kHz 

• Sampling Rate: 32kHz / 24-bit

• Signal-to-Noise Ratio: >70dB 

• Latency: <25ms 

• Battery Life:

  • ~6–8 hours per transmitter 

  • Up to ~30 hours with charging case

• Charging Port: USB-C 

• Charging Time: ~1.5–2 hours 

• Weight: ~8g (ultra-light) 

• Build: ABS plastic 

   Quick Highlights

• Ultra-compact button-style design

• Magnetic clip attachment (no visible wires)

• AI noise reduction for clearer voice

• Plug-and-play with Android (Type-C) & iPhone (Lightning) 

• Ideal for vlogging, interviews, live streaming, online classes 

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