Can you connect a microphone to it so that the headphone users can hear you?

I believe that a microphone output would need to be boosted by going through a pre-amplifier stage, as the microphone will not have enough power.

Can you make it so it can play music on different sides like a silent disco? So you could have 2 on one song and 2 on another.i hope that makes sense

There is only one common audio source input. All headphones connected to the transmitter will receive the same audio.

Can u charge up the transmitter so it works without a having to plug it in when outside? How long does that charge last?

The transmitter contains no battery but has a micro USB for a 5V power source. I plug mine straight into a projector USB port, but it would work equally well with a small portable USB a power bank like you’d use for charging a mobile phone.

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Quartet

Product ID: 429478535

Details

Brand
Avantree
Colour
Black
Connectivity technology
Wireless
Ear placement
Over Ear
Form factor
Over Ear
Frequency response
20000 Hz

🎧4 wireless headphones included

📡Connect up to 100 units simultaneously

⏱️Ultra-low 7ms audio latency

Description

🎉 Elevate your group listening game—silence the noise, amplify the vibe!

CRYSTAL CLEAR SYNC - Experience flawless audio-visual harmony with industry-leading 7ms RF latency—no lip-sync delays, ever.
SILENT DISCO READY - Host epic backyard or group movie nights without disturbing neighbors or missing a beat.
UNIVERSAL COMPATIBILITY - Works effortlessly with TVs, projectors, AV receivers, mixers, and more via optical, AUX, or RCA inputs.
MASSIVE MULTI USER SUPPORT - Seamlessly connect up to 100 headphones to one transmitter—perfect for schools, churches, or large events.
PERSONALIZED VOLUME CONTROL - Each headphone offers independent volume adjustment, so everyone tunes in at their perfect level.

The Avantree Quartet is a premium 4-pack wireless headphone system designed for group audio sharing with up to 100 simultaneous connections. Utilizing RF 2.4GHz technology, it delivers ultra-low 7ms latency for perfect audio-video sync. Each headphone features independent volume control and pairs with any device via optical, AUX, or RCA inputs, making it ideal for silent discos, outdoor movie nights, classrooms, and more.

Specifications

ASIN	B09BHQDHFS
Age Range Description	Adult
Antenna Location	Family Movie, TV Watching
Audio Driver Type	Dynamic Driver
Audio Latency	7 Milliseconds
Battery Average Life	20 hour
Battery Charge Time	3 hours
Best Sellers Rank	44,235 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 224 in Studio Headphones
Bluetooth Version	4.0
Box Contents	Wireless Headphones
Brand Name	Avantree
Cable Features	Without Cable
Colour	Black
Compatible Devices	TV, Projector, Stereo AV Receiver, Mixer board, Blu-ray Player
Control Method	Touch
Control Type	Volume Control
Controller Type	Touch
Customer Package Type	FFP
Customer Reviews	4.5 4.5 out of 5 stars (254)
Earpiece Shape	Over-ear
Enclosure Material	Faux Leather
Frequency Response	20000 Hz
Headphone Form Factor	Over Ear
Headphone Jack	6.35 mm Jack
Headphones Ear Placement	Over Ear
Impedance	32 Ohms
Is Autographed	No
Is Electric	Yes
Item Weight	220 Grams
Manufacturer	Avantree
Model Name	Quartet
Model Number	WSHT-5049
Network Connectivity Technology	Wireless
Noise Control	Sound Isolation
Number of Items	4
Product Features	Multipoint Pairing
Specific Uses For Product	Entertainment
Style Name	1 to 4 Set
Theme	Movie
Unit Count	4.0 count
Water Resistance Level	Not Water Resistant
Wireless Technology Type	RF

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