

How Many Bluetooth Connections at Once – iPhone Simply powering them on then selecting them on the Bluetooth screen should connect them. If they have been paired before, then you won’t need to put the headphones into pairing mode. Otherwise they will be listed in the top section. If you’ve never paired these headphones with your iPhone before, then they will be listed under the Other Devices section. The steps in this section will work on most iPhone and iPad models with most Bluetooth audio devices. How to Pair Bluetooth Headphones to an iPhone Via Bluetooth Audio

The Bluetooth keyboard is this model from Logitech (click to view on Amazon).
The Bluetooth headphones that I was trying to pair were this pair from Sony (click to view on Amazon) and this pair from Rocketfish (click to view on Amazon). You could also use a Bluetooth headphone splitter like this Kokkia branded one from Amazon (if you have an iPhone with a 30-pin connector), or this other Kokkia model on Amazon that connects to the 3.5mm jack on your iPhone, for iPhone models without a 30-pin connection. The only solution to listen to audio on multiple headphones would be to use a headphone splitter, like this one on Amazon. So it seems that the iPhone can only output audio to one device at one time.
