Can this connect to speaker output for rear speakers?

The input is for a line level out from a sound source BEFORE an amplifier. IF you are looking for something to use on the speaker side of an amplifier this WILL NOT WORK.

I tried using this for a bose bass 500 subwoofer which has a 3.5mm audio plug at each end, but it didn't work. bose may use a special signal. ideas?

This is designed for a line out from the source to the amp. It uses RCA jacks. If you are using between amp and speakers, that is an amplified signal and most likely overdriving this unit. Just my thoughts. Hope this helps.

Is it possible to get replacement antennas for the RT5066? Mine are missing.

I am not sure but I don't see why not. You can use other antenna that fits the thread.

Can you buy an extra receiver? I need 1 transmitter and 2 receivers.

The product we don't sell separately comes in a complete set.

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1Mii 2.4Ghz (1 TX + 1 RX) Wireless Audio Transmitter Receiver for TV, 320ft Long Range 20ms Low Delay HiFi Audio, Wireless Adapter Kit for Powered Speaker/Stereo/Soundbar, RCA(3.5mm AUX) Out/Input

Product ID: 398052450

Details

Audio Output Mode
Stereo
Brand
1Mii
Color
black
Compatible Devices
Home Stereo
Connectivity Technology
2.4GHz
Connector Type
RCA

⚡20ms ultra-low latency

📡320ft wireless range

🔊HiFi stereo sound

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Description

🎧 Cut the Cables, Not the Quality — Wireless Audio That Works As Hard As You Do!

PLUG PLAY SIMPLICITY - Instant pairing right out of the box—no tech headaches, just pure wireless audio bliss.
LIGHTNING FAST 20 MS AUDIO SYNC - Experience crystal-clear sound with near-zero delay—perfect for TV, gaming, and live music setups.
ROBUST ANTI INTERFERENCE DESIGN - Enjoy stable, noise-free audio even in busy Wi-Fi or office environments—your sound stays pristine.
SEAMLESS 320 FT WIRELESS FREEDOM - Cut the cords and stream your audio across rooms or even your backyard without signal dropouts.
UNIVERSAL RCA 3 5 MM COMPATIBILITY - Connect effortlessly to any powered speaker, soundbar, or stereo system with versatile input/output options.

The 1Mii RT5066 wireless audio transmitter and receiver kit delivers high-fidelity stereo sound with an impressive 320ft range and ultra-low 20ms latency over 2.4GHz wireless technology. Designed for effortless plug-and-play use, it supports RCA and 3.5mm connections to powered speakers, soundbars, and home stereo systems, eliminating messy cables while maintaining crystal-clear, synchronized audio. Ideal for professionals seeking seamless, high-quality wireless audio streaming across multiple devices and spaces.

Specifications

ASIN	B09MCGQ8S2
Audio Output Mode	Stereo
Audio Output Type	Speakers
Best Sellers Rank	#18,119 in Electronics ( See Top 100 in Electronics ) #99 in Wireless Audio Receivers & Adapters
Brand	1Mii
Built-In Media	1Mii RT5066 Wireless Audio Transmitter+ Receiver, Antenna 2, DC 5V Power Cable+Power Adapter 2, RCA Audio Cable * 2, RCA to 3.5 Male Audio Cable * 2
Color	black
Compatible Devices	Home Stereo, Speaker, Television
Connectivity Technology	2.4GHz, Wireless
Connector Type	RCA
Control Method	Remote
Controller Type	Push Button
Customer Reviews	4.1 4.1 out of 5 stars (645)
Format	WAV
Item Dimensions D x W x H	2.3"D x 3.8"W x 0.94"H
Manufacturer	1Mii
Mfr Part Number	RT5066R1
Model Number	RT5066
Number of Channels	2
Other Special Features of the Product	Audio Transmitter and Receiver w/ RCA Input& Output, HiFi Stereo Sound, Long Wireless Range 320ft (100m), Plug and Play, Wireless Subwoofer Adapter 2.4Ghz Low Latency
Output Power	5 Watts
Output Wattage	5 Watts
Surround Sound Channel Configuration	2
Warranty Description	1 year manufacturer
Wattage	5 watts
Wireless Technology	2.4Ghz

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₩186428

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In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

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