HOWEVER, both speakers limited this device to SBC mode which means there was a VERY noticeable delay between the daisy-chain output and the BT speakers--to the tune of 150-200 ms.

It was much less expensive than buying a set of powerful wireless speakers.

The Bluetooth speakers I purchased work just fine, they connect to any phone or table that I want.

The RTX 2.0 must be in transmit mode, you pair your speaker to the RTX 2.0 by pressing the power button for 3 seconds until the blue light on channel 1 blinks faster.

Currently connected to an Xbox One, paired to a portable speaker and headphones.

Portable Bluetooth Speaker - Exceptional Bass and Rich Stereo Sound, Plays Loud, 14-Watts, 100ft Wireless Range, Play 2 together for Music in Dual Stereo, Splashproof Black

I connected the same speaker and the audio stream never broke up whether on front patio, in garage or back patio the audio was solid.