Soundcore H30i A3012 Headband Wireless Bluetooth Headset 1. Bluetooth version: 5.3 2. Battery capacity: 800mAh 3. Input: 5V 0.8A 4. Charging port: Type-C 5. Codec: AAC, SBC 6. Packing list: headphone, audio cable, charging cable 7. Weight: about 183g 8. Size: about 18.6 x 16.7 x 7.5cm Features: 1. Frosted cover with metal hook edge, low-key and textured 2. Integrated lightweight design, easy to wear 3. Ergonomic design, multi-point balanced pressure relief, combined with comfortable technology materials, the overall wearing is more comfortable 4. High elastic beam design, comfortable and does not press the head 5. Retractable support wall, adapt to different head shapes 6. Bionic protein earmuffs, softer and more skin-friendly 7. Multi-angle shaft, more fit to the ears 8. 40mm super-sensitive large dynamic coil, restore more sound details, full low-frequency layers, thick and moist mid-frequency, clear and transparent high frequency 9. You can DIY personalized sound effects in the soundcore App, 9 major frequency bands are adjustable, and you can freely adjust the high, medium and low frequency parameters 10. 22 preset EQs are optional, and various common music styles such as classicalrockpopvocal can be found 11. 200 kinds of white noise DIY free combination such as wind, rain, bird sounds, water sounds, etc. 12. Bluetooth 5.3 high-speed connection, higher sound quality, more stable connection, lower latency 13. Physical button design, reduce accidental touches, better hand feedback 14. Dual devices are connected at the same time, and mobile phones and computers automatically switch