Can you change which of your 2 bluetooth devices you're are streaming too?

Not automatically no. It’s quite mechanical. You either connect or disconnect a device. If u want to choose which headphones to connect to, you either have to do it from The transmitter (which is not so straight forward), or you will to unpair / turn off the headphones that you dont want to use.

Will this connect to the bose s1, extending the distance? some dj gigs i need a wireless speaker set up.

Two of them as a pair (one in transmit mode and the other in receive mode) have a theoretical line-of-sight transmission distance of 265 ft. So if that is greater than your present Bluetooth limits, and your Bose speakers have standard line-level input jacks, the answer to your question should probably be “yes”. I’m presently using two across opposite ends of a home theater, and the nearly instantaneous “lip-sync” transmission of extremely high-quality stereo audio is truly impressive.

will this connect to a radio with a 3.5 mm headphone jack? . The radio in not bluetooth but I want it to transmit BT

You can use AUX3.5mm to connect the radio and B03Pro+, and then use a Bluetooth headset to pair with B03Pro+ via Bluetooth.

Can this pair with Jabra Elite 75t

Don't know, BUT It will not pair with 4 different bluetooth speakers I own. It will pair with windows laptop and desk top HP. speakers I bought from Amazon (Doss Soundbox XL) Will not pair. 1 out of 5 rate score for me. Amazon sent me a Email or I wouldn't waste my time. But fill my in box and you shall receive. Buy the cheep one, check the Frequency of your device FIRST !!!

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1Mii B03Pro Bluetooth 5.3 Transmitter Receiver for TV Home Stereo, Wireless Audio Adapter with Audiophile DAC & aptX Low Latency/HD/Adaptive, Volume Control, Dual Link, Optical RCA AUX Outputs/Inputs

Product ID: 230544110

Details

Brand
1Mii
Connectivity Technology
Bluetooth
Material
Acrylonitrile
Power Source
Corded

🎧Dual aptX Low Latency streams, <40ms delay

📡Bluetooth 5.3 with 265ft/80m range

🔊ESS Sabre Audiophile DAC 121dB SNR

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£71.17

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Description

🎶 Elevate your soundscape — audiophile-grade wireless freedom for the discerning ear!

DUAL DEVICE STREAMING - Connect two Bluetooth headphones or speakers simultaneously with aptX Low Latency tech to eliminate lip-sync delays and share your audio vibe effortlessly.
PLUG PLAY SIMPLICITY - No tech headaches here—just connect, power on, and enjoy instant Bluetooth pairing with 99% of devices, backed by thoughtful design and premium build quality.
VERSATILE MULTI INPUT OUTPUT - Plug into any setup with Optical, RCA, and 3.5mm AUX ports—perfect for TVs, stereos, and personal devices, making your audio ecosystem smarter and sleeker.
AUDIOPHILE GRADE SOUND QUALITY - Experience pristine, lossless audio with the ESS Sabre DAC delivering a stellar 121dB signal-to-noise ratio for crystal-clear highs and deep lows.
NEXT GEN BLUETOOTH 5 3 CONNECTIVITY - Seamlessly stream with ultra-stable, long-range wireless up to 265ft line-of-sight, ensuring your music follows you anywhere at home or office.

The 1Mii B03Pro is a cutting-edge Bluetooth 5.3 transmitter and receiver featuring an ESS Sabre audiophile DAC with a 121dB signal-to-noise ratio. It supports multiple aptX codecs including Low Latency and HD for superior wireless audio quality. Designed for long-range use with dual antennas, it offers up to 265ft line-of-sight connectivity and can stream to two Bluetooth devices simultaneously. Compatible with Optical, RCA, and 3.5mm AUX inputs/outputs, it integrates effortlessly with home stereos, TVs, headphones, and speakers. Ideal for professionals and audiophiles seeking premium wireless audio performance with hassle-free setup.

Specifications

ASIN	B08J7MKYN1
Additional Features	Connect 2 wireless headphones or speakers, High-definition Audio, Optical, 3.5mm AUX, RAC Port, aptX Low Latency/HD/Adaptive, with Extra DAC
Audio Input	RCA, 3.5mm AUX, Optical
Audio Output Mode	Stereo
Audio Output Type	Headphone, Speaker
Best Sellers Rank	#28,080 in Electronics ( See Top 100 in Electronics ) #147 in Wireless Audio Receivers & Adapters
Bluetooth support?	Yes
Brand	1Mii
Built-In Media	1Mii B03Pro Bluetooth Transmitter Receiver, 3.5mm AUX, RCA to 3.5mm AUX, Optical Audio Cable, USB Power Adapter and USB Power Cable, User Manual
Color	Black1
Compatibility Options	Amplifier, Personal Computer, Tablet, Smartphone, Television, Headphone, Speaker
Compatible Devices	Amplifier, Headphone, Speaker, Personal Computer, Tablet, Tablet, Smartphone, Television
Connectivity Technology	Bluetooth
Connector Type Used on Cable	RCA
Control Method	Push Button
Controller Type	Button Control
Customer Reviews	4.2 4.2 out of 5 stars (1,103)
Enclosure Material	Acrylonitrile Butadiene Styrene (ABS)
Hardware Interface	Bluetooth
Includes Remote	No
Installation Type	External
Item Dimensions L x W x H	3.8"L x 2.9"W x 0.9"H
Manufacturer	1Mii
Model Name	B03Pro
Number of Channels	2
Outer Material	Plastic
Power Source	Corded Electric
Rechargeable Battery Included	No
Supported Application	Any audio application
Supported Media Type	Bluetooth
Supported Standards	Bluetooth 5.3, aptX Adaptive, aptX Low Latency, aptX HD, aptX, AAC, and SBC
Warranty Description	12 Months
Wireless Compability	Bluetooth

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