Features : Flexible, light weight, comfortable fit and durable design. Best choice when you do sports. Adopt true wireless technology, enjoy your wirelessly sports. Double-ear main and subsidiary earpiece design, innovative and excellence. Intelligent charging box provides fast charge, worry free for endurance. Strong compatibility and compatible with devices as long as they are Bluetooth support. BT5.0 bluetooth version ,excellent sound quality For Apple interface; The earphone automatically start up when it is taken out from the charging compartment, and is put into the charging compartment for automatic charging. Support Answer/hang up the phone; Switch songs. High Quality True Copper Ring Loudspeaker Chip: True Stereo Chip Play time: 3-4 hours Standby time: 100 hours Call time: Headset Battery Capacity: 40ma 55 mA Charging box battery capacity: 300ma Effective distance: 10+M Total weight: about 86g Packing size: about 4.3*1.7*0.7cm/ Specifications: Ergonomic customized design, to ensure a comfortable ear sense. Double earphones calling Flexible, light weight, comfortable fit and durable design. Best choice when you do sports. Make your life more convenient. Package Included: 1*Bluetooth Headphones (left and right earphones) 1*Charging Box Dock 1*Charging Cable 1*User Manual