❤️Rotary design: star ring design, rotary opening, farewell to the troubles brought by the flip.❤️Seamless master-slave switching: single and dual ears can be used to seamlessly, which can be heard and shared independently, and can be used at any time.❤️Real copper ring moving coil unit: the details of the music are completely displayed. The high-frequency clear and transparent human voice naturally tells the story. The low-frequency is thick and the rigid cavity reduces the low-frequency resonance while diving.❤️Bluetooth 5.2: the chip is equipped with an all-round decoding algorithm to output and lossless sound quality. Bluetooth 5.2, take out the second connection, and the transmission is faster and more stable.❤️Waterproof and sweat proof: ipx6 waterproof and sweat proof, unique sports design, no fear of sweating during sports.model:KM89Usage time:5.5HBluetooth model:fiveEarphone capacity:Charging chamber 180MAH，Headset 30mahEffective range:10MCharging interface:Type-C1X headset1X charging cable1X instruction