Can these be used continuously wile plugged in to a wall socket or usb port and a powered speaker?

YES, you can. You also can use the Avantree Quartet transmitter instead as that transmitter has no built-in battery.

Can I only use certain headphones styles for plug in? It doesn’t appear to have an Apple type connection.

You can use any headphones with 3.5 Jack connector

How many headphones can you connect to a receiver? Manuf. website indicates you can connect two to one receiver. So 3 Receivers = 6 headphones connect

AS FAR AS I KNOW, you can connect only 1 3.5mm earphone to each receiver, or 1 optical interface device, but not both at the same time. You *could* use a 3.5mm y-cable to connect 2 3.5mm earphones to one receiver, but keep in mind there is only 1 volume control on the receiver, so both earphones would be at same volume. I am not aware of any manufacturer support for 2 earphones connected to one receiver. I suggest you ask Avantree this question to clarify their support.

Can the transmitter have a microphone as the audio source?

Yes, you can connect the transmitter to a microphone headphone monitor output as audio source. If your microphone does not have that output, then it will not work.

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Description

🎉 Elevate Your Audio Experience - Connect, Enjoy, Repeat!

CONNECT WITH EASE - Enjoy seamless audio for up to 100 headphones, perfect for family movie nights or silent concerts.
LATENCY FREE EXPERIENCE - Experience audio lag as low as 30ms, ensuring perfect sync for movies and music.
UNIVERSAL COMPATIBILITY - Transmits audio from any device with AUX or optical output, making it versatile for all your entertainment needs.
EXTENDED RANGE STABILITY - Enjoy a reliable connection up to 30m, indoors or outdoors, without interruptions.
PERSONALIZED VOLUME CONTROL - Each receiver allows independent volume adjustments, catering to everyone's listening preferences.

The Avantree Audiplex Wireless High Range Low Latency Multiple Audio Transmitter & Receiver Set allows you to connect up to 100 headphones for a shared audio experience. With universal compatibility, low latency of 30ms, independent volume control, and a stable range of up to 30m, this system is perfect for any audio setup, from home theaters to outdoor events.

Specifications

Control Type	Volume Control
Human-Interface Input	Buttons
Connector Type Used on Cable	6.35mm Jack
Hardware Connectivity	Bluetooth
Battery Weight	56 Grams
Lithium Battery Weight	0.8 Grams
Item Weight	318 Grams
Item Dimensions L x W x H	4.49"L x 2.95"W x 1.18"H
Compatibility Options	Wireless, Bluetooth, 6.35mm Jack, Television, Speaker
Compatible Devices	Television, Speaker
Mounting Type	Wall Mount
Includes Remote	No
Color	Black
Additional Features	audio bitrate/sampling rate: 16bit/48khz
Material Type	Aluminum
Voltage	240 Volts
Number of Batteries	4 Lithium Polymer batteries required. (included)
Rechargeable Battery Included	Yes
Power Source	Battery Powered
Number of Lithium-ion Cells	1
Lithium-Battery Energy Content	0.8 Watt Hours
Supported Battery Types	Lithium-Polymer
Battery Charge Time	2 Hours
Bluetooth support?	No
Wireless Compability	Bluetooth
Connectivity Technology	Wireless
Audio Output Mode	Stereo
Number of Channels	2
Audio Input	AUX, Optical
Audio Output Type	Speaker

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