I recently picked up an R-15PM set and am very happy with it. Got it from someone who didn't know what they had. Paid $50
They came with speaker set only. Nothing else. So no remote.
I'm pretty good with figuring things out & this is how I connected my phone via Bluetooth:
After powering the system on, push the volume/source knob until the light in the lower right corner of the speaker turns blue (blue for bluetooth 😄) Push & hold that knob until the light starts flashing rapidly (discovery mode). Search for the device. My phone found it (Klipsch R-15PM) and it connected right up.
My phone is a Samsung Galaxy A-71 5G.
I hope this helps anyone having problems.
Cheers