The wireless bone conduction headphones feature an open-ear design that doesn't need to be placed in the ear, suitable for sports, relaxation, going out and the office.features hifi sound effect is fully open, with three band balanced and surging stereo surround sound effect. Ergonomically ear clip on designed, comfortable to wear, and the sound quality can be adjusted by moving up and down. With intelligently noise reduction function, which can play a good role in noise reduction, no matter in calls or music. Equipped with bluetooth 5.3 chip, low loss data transmission, fast response. Dual bluetooth design, the left and right earphones can connect to two mobile phones at the same time. One button intelligent touch control says goodbye to all complicated operations. With led intelligent electric quantity display in charging cabin, no need to worry about being out of power. Low battery reminder. Specifications material abs pc color black size horndia. 16mm charging compartmentwxlxthick. 4.5 x 7 x 2cm charging cable length 30cm bluetooth version bluetooth 5.3 bluetooth transmission distance less than 10m charging compartment capacity 300mah headphone battery capacity 40mah charging time of charging box about 2 hours headphone charging time about 1.5 hours music playing time about 4-6 hours charging port type-c charging voltage dc 5v package contents 1 x bluetooth headphone 1 x type-c charging cable 1 x user manual