Ulanzi A21 Wireless Microphone(Black-Type C) Ulanzi

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The Ulanzi A21 (A053) is a two-channel wireless microphone system designed for recording two people using a smartphone, tablet, or computer equipped with a USB-C port. Two miniature transmitters, a receiver, and a charging case make up this compact kit for interviews, vlogs, podcasts, and live streams.

Each transmitter weighs approximately 8 g and can be attached using a clip, magnet, or lanyard. The omnidirectional capsules capture natural voice and sound at 32 kHz / 24-bit quality, while intelligent noise reduction helps keep speech clear even in noisier environments.

Two Voices at Once

The receiver processes two separate transmitters, making the A21 ideal for interviews, joint presentations, or podcasts with two people. Connection is automatic and requires no app. Modes include original audio, AI noise reduction, reverb, and mute.

Stable transmission up to 100 meters

The 2.4 GHz digital connection works in open space at distances of up to 100 m with latency under 40 ms. The USB-C receiver is compatible with modern Android phones and tablets, USB-C-equipped iPhones, and other supported devices. The pass-through USB-C port allows you to charge a connected phone while recording.

Longer Recording Time with the Charging Case

The transmitter lasts up to 6 hours of operation. The included 400 mAh case can fully recharge a pair of transmitters twice and also safely stores them during transport. Fur-lined windshields help reduce wind noise during outdoor recording.

Key Features

• Two-channel system for recording two people
• USB-C receiver with pass-through charging for your phone
• 360° omnidirectional pickup
• 32 kHz / 24-bit recording
• AI noise reduction and echo cancellation mode
• Range of up to 100 m in open space
• Transmitter battery life up to 6 hours
• Charging case for two additional full charges

• 1× USB-C receiver
• 2× Ulanzi A21 microphone transmitters
• 1× charging case
• 2× furry windshields
• 2× clips
• 2× magnets
• 2× lanyards
• 1× charging cable
• 1× user manual

• Brand: Ulanzi
• Model: A21
• Manufacturer code: A053
• Color: black
• Number of audio channels: 2
• Number of transmitters: 2
• Receiver connector: USB-C
• Wireless transmission: 2.4–2.4835 GHz
• Maximum range: 100 m in open space
• Latency: <40 ms
• Directional pattern: omnidirectional
• Frequency range: 20 Hz–20 kHz
• Sampling rate: 32 kHz / 24 bits
• Maximum sound pressure level: 101 dB SPL
• Sensitivity: −38 dB
• Transmitter battery capacity: 75 mAh
• Transmitter battery life: up to 6 hours
• Charging time: approximately 1.5–2 hours
• Charging case capacity: 400 mAh
• Transmitter dimensions: 28 × 26 × 13 mm
• Transmitter weight: approximately 8 g
• Receiver dimensions: 40 × 25 × 11 mm
• Receiver weight: approximately 5 g
• Charging case dimensions: 93 × 38 × 32 mm
• Charging case weight: approximately 49 g