While solar can’t tackle most real-time energy demands, it’s plenty to handle a Bluetooth headset in standby — which we must say, seems like a decent use for the tech. You’ll never have to worry “is this thing that makes me look like a douchebag even working???” again.
Additionally, should you choose to purchase two headsets and actually wear them at the same time, you’ll be able to appreciate A2DP (stereo Bluetooth) through multiple pairing. You know our feelings on that manoeuvre, so to state them yet again would be unseemly.