Jaybird BlueBuds X Bluetooth In-Ear Headphones. BlueBuds X are the smallest Bluetooth headphones available, yet they pack an incredible 8 hours of play time, double that which has previousely been possible from a product this small. Enjoy a full day of music and calls, or work out an hour a day for an entire week on a single charge. So buy this Jaybird BlueBuds X Bluetooth In-Ear Headphones Was £149.00 Now £134.10.