How does it indicate that it is muted? does something light up on the device?

There is a mute symbol of a microphone with a slash \ through it that lights up when on mute. The device works really well.

What is the difference between the 350 and 350N both listed here on Amazon?

Dear Customer, 350N is applied with a different electronic solution from 350, but their appearance is the same. Thanks for your question.

does this speakerphone work as a speaker for playing video, youtube, streaming etc?

it did not meet the needs of what I was after so returned it.

Is the sound loud? and are there any echo for listener or speaker?

I find it plenty loud for everyday conference calls, and i have never heard from anyone that I have any echo.

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CMTECK USB Speakerphone, Microphone Speaker Combo for Home Office Conference Calls, Portable Desktop Microphone with 360º Voice Pickup, Noise Reduction, Mute Function, Volume Control, ZM350N

CMTECK USB Speakerphone, Microphone Speaker Combo for Home Office Conference Calls, Portable Desktop Microphone with 360º Voice Pickup, Noise Reduction, Mute Function, Volume Control, ZM350N

Product ID: 376570595

Details

Brand
CMTECK
Connectivity technology
USB
Connector type
USB
Model name
ZM350
Recommended uses for product
Gaming Singing

🎤Noise Reduction

💻USB Plug&Play

🔊360° Voice Pickup

Description

🎙️ Elevate Your Conference Calls with Style!

EFFORTLESS SETUP - Plug and play with no drivers needed—just connect and go!
USER FRIENDLY CONTROLS - Easily mute and adjust volume with a simple touch for hassle-free calls.
VERSATILE COMPATIBILITY - Works seamlessly with Windows and Mac OS for all your conferencing needs.
SLEEK AND PORTABLE DESIGN - Stylish metal matte finish that’s both durable and easy to carry.
CRYSTAL CLEAR COMMUNICATION - Experience high-definition audio that captures every nuance of your voice.

The CMTECKUSB Speakerphone is a portable desktop microphone and speaker combo designed for home office conference calls. It features 360° voice pickup, high-definition audio, and user-friendly controls, making it perfect for various applications like Zoom, Skype, and podcasting. With a sleek design and USB plug-and-play functionality, it ensures a hassle-free experience for professionals on the go.

Specifications

ASIN	B099F8RVJT
Antenna Location	Gaming, Singing, Streaming
Audible Noise	80 Decibels
Best Sellers Rank	#157,446 in Computers ( See Top 100 in Computers ) #845 in Computer Microphones
Brand	CMTECK
Built-In Media	usb cable, user manual
Color	ZM350-Dark Black
Compatible Devices	Laptop, Personal Computer, Speaker
Connectivity Technology	USB
Connector Type	USB
Customer Reviews	3.5 3.5 out of 5 stars (103)
Enclosure Material	Metal
Frequency Range	20 hz 20 khz
Hardware Platform	Laptop, PC
Manufacturer	CMTECK
Mfr Part Number	ZM-350
Microphone Form Factor	Boundary
Model Name	ZM350
Model Number	ZM350
Number of Channels	1
Polar Pattern	Omnidirectional
Power Source	Corded Electric
Signal-to-Noise Ratio	80 dB
Special Feature	Mute Function, Volume Control
UPC	783639302447

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