LEMFO F11 Wireless Stereo Bluetooth Headsets - Intelligent Magnetic Clasp Noise Cancelling Sport Sweatproof Microphone Hands-Free APT-X Tech LEMFO F11 athlete bluetooth headphone applied innovative design, putting magnet at end of both earplugs to make the whole unit as a circle, thus enhance the utilization feasibility and easy carrying. With consideration of sport utilization, F11 adopts intelligent magnet at earplugs end, separate means answer a phone call, adsorption means end calls. Building-in HD microphone, together with unique noise reduction technology, F11 delivers better user experience. Optimized cavity structure, intelligent triequilibrium, embedded high quality speaker, supporting APT-X & A2DP, all those make F11 profession sounds quality which close to CD level. Adopting ergonomic design, along with medical level earplugs, F11 delivers ultra comfortable wearing experience. 99% compatible with main-stream moblie phone, laptop and tablets. Building in Polymer lithium battery to enhance endurance capability which allows 8 hrs talking time and 160 hrs stand-by.