Wireless Hanging Ear Bluetooth Earphone Bone Conduction No In-Ear Open Sports Earphones 1. Bluetooth version: 5.4 2. Frequency response: 20Hz-20Kz 3. Support protocol: SBC, AAC 4. Sensitivity: about 92.5dB 5. Charging box charging port: Typ-C 6. Battery capacity: charging compartment: 300mAh, earphone: 70mAh 7. Use time: about 6-8h single renewal, about 48h with charging compartment 8. Standby time: about 24-36h 9. Charging case size: about 5.5 x 2.5 x 9.5cm 10. Weight: about 92g Features: 1. 90-degree adjustable pivot support, large and small ears can be worn, SFE close to the ear ergonomic design, 90-degree vertical suspension positioning angle, comfortable to the ear, light to wear 2. Panoramic stereo sound, HIFI sound field, three-frequency equalisation, digital sound enhancement, ACS panoramic sound effect 3. 360-degree ACS panoramic surround sound, 16.2mm large diaphragm moving coil speakers 4. The use of pulse DT3.0 directional sound transmission, integrated speed of sound propagation of the human voice clearly into the ear, to protect privacy to avoid the embarrassment of sound leakage 5. Stable high-speed transmission speed, ENC environment call noise reduction 6. 3-point support structure, open earhook, stable and not fall off 7. 0.7mm soft titanium wire, bend at will, not pick the ear shape 8. Silicone airbag, comfortable and elastic, random concave modelling 9. Bluetooth 5.4 chip, fast connection, listening to songs, calls more stable, low power consumption, high performance processing 10. IPX5 sweatproof and waterproof