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Features:
Integrated Microphone & Speaker: Built-in amplifier and omni-directional microphone integrated as one, it is capable of capturing sound in 2m radius, with 360-degree voice coverage.
Easy to Setup: It has volume up/down keys, one-key-mute design and line in and linking cable port, convenient to setup and use. Monitoring jack makes headphone monitoring available.
Lightweight &  Portable: Round and plain body makes it steady to place on the table, and pretty convenient to carry with you and start conference anytime and anywhere.
Wide Application: It can greatly help smartphones, tablets, MP3 Player and PC to deliver louder sound during phone call and video conference, make the contents clearer to hear.
Bunch of Accessories: The package comes with bunch of cables like 3.5mm TRRS audio output cable, USB Type-C to USB-A cable and USB Type-C to USB Type-C cable.

Specifications:
Brand: BOYA
Model: BY-BMM400
Transducer: Condenser
Polar Pattern: Omni-directional
Frequency Response: 40-15,000Hz
Output Power: 2.5W
Power Requirements: Built-in 800mAh lithium battery or DC 5V/500mAh
Charging Time: Approx. 2.5h
Built-in Battery Life: Approx. 4.5h
Coverage Range: 2m/6.6ft radius
Cable Length: 1.2m/3.9ft
Dimension: 12 * 12 * 3.3cm / 4.7 * 4.7 * 1.3in
Net Weight: 220g / 7.8oz