Foneso F10 Bluetooth Stereo Sport/Workout Wireless Earphones/Earbuds. Never Used. Listed as Preowned only because it is out of box and I misplaced box. Lightweight. This is a F10 CSR Bluetooth 4.1 workout wireless sport earphone/ear buds. It’s resistant to sweat and water, has clear sound. It has ability to accept phone calls, skip track, and adjust volume. Approx 10 hours of use time before next charge. Use for working out, walking, cleaning - for anything! New condition! Smoke free home. Fast Shipping.