Is there an USB adaptor or 1/8 for computer hook up?

No. XLR connector only A USB adaptor can be purchased but it must have phantom power.

how many mics for a 16 x 18 room with about 35 people?

It's difficult to answer your question because I don't know how you have the room set up. If you are sitting around 8 ft tables you would need one on each table. These microphones are not set up to carry a long distance. It's a good microphone but is limited somewhat in range. It sounds like maybe you need to look for something else.

why does it say wireless in Connector Type and also says it comes with a 12 ft. connecting cable which is it?

I just looked at the description and I can’t find where it says: “…wireless in Connector Type and also says it comes with a 12 ft. connecting cable which is it?" These are NOT wireless. They are hard wire only. They come with an attached 12ft XLR cable. They are worth every penny. Great quality.

Could 2 of these with a preamp add congregational singing & pipe organ (40x50 sanctuary) for streaming? Another channel connects the sound system.

It probably would but the response would be very tinny sounding. The frequency is mostly high end. Not for music.

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Shure CVB-B/O Boundary Condenser Microphone, 12 feet Cable, Omnidirectional (Black)

Product ID: 326220206

Details

Brand
Shure
Connectivity technology
XLR
Connector type
XLR
Model name
CVB-B/O
Recommended uses for product
Video

🔌12 ft XLR cable included

🎙️Omnidirectional clarity

🛡️CommShield RF interference guard

Description

🎧 Elevate your sound game—because your voice deserves the spotlight.

RUGGED LOW PROFILE DESIGN - Sleek black finish and durable construction blend effortlessly into any workspace or podium without drawing attention.
INTERFERENCE FREE AUDIO EXPERIENCE - CommShield technology blocks disruptive RF signals from smartphones and wireless devices, ensuring pristine sound quality.
PLUG AND PLAY WITH PRO GRADE CABLE - Includes a robust 12-foot XLR cable for seamless integration with professional audio setups—no extra gear needed.
CRYSTAL CLEAR OMNIDIRECTIONAL PICKUP - Capture every word and nuance with 360° sound clarity, perfect for dynamic meeting rooms and presentations.
WIDE FREQUENCY RESPONSE HIGH SPL HANDLING - Handles fast transients and loud sources up to 117dB SPL, delivering rich, distortion-free audio every time.

The Shure CVB-B/O Boundary Condenser Microphone is a professional-grade omnidirectional mic designed for desktop and podium use. Featuring CommShield technology to eliminate RF interference, a 12-foot XLR cable for easy setup, and a rugged low-profile design, it delivers clear, high-fidelity audio with a wide frequency response and high SPL handling. Ideal for meeting rooms, presentations, and installed sound reinforcement.

Specifications

ASIN	B00A361UMS
Antenna Location	Video Conference
Audible Noise	117 Decibels
Audio Sensitivity	32.5 Decibels
Brand	Shure
Built-In Media	CVB-B/O Boundary Condenser Microphone, 12 feet Cable, Omnidirectional
Color	Black
Compatible Devices	Personal Computer
Connectivity Technology	XLR
Connector Type	XLR
Customer Reviews	4.5 4.5 out of 5 stars (258)
Enclosure Material	Engineered Plastic or Similar Synthetic Material
External Testing Certification	Não Aplicável
Frequency Range	50 hz 15 khz
Frequency Response	20 KHz
Global Trade Identification Number	00042406243575
Hardware Platform	Smartphone
Impedance	150 Ohms
Item Dimensions	6.4 x 16.5 x 10.2 centimeters
Item Weight	0.76 Pounds
Manufacturer	Shure
Mfr Part Number	CVB-B/O
Microphone Form Factor	Boundary
Model Name	CVB-B/O
Model Number	CVB-B/O
Number of Batteries	1 Lithium Ion batteries required.
Number of Channels	1
Number of Items	1
Number of Packs	1
Polar Pattern	Omnidirectional
Power Source	PHANTOM POWER: All condenser microphones require phantom power to operate. Please refer to the User Manual for more details on power requirements.
Signal-to-Noise Ratio	117 dB
Special Feature	Portable
UPC	042406243575

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