Ultimate HIFI TWS: Hymalaya DAC and Headphone Amp drive the Topology Diaphragm driver The DAC developed by HIFIMAN is named HYMALAYA HIFIMAN Topology Diaphragm The "Topology Diaphragm" refers to a diaphragm that features a special Nanoparticle coating applied to its surface. The result is a more natural and detailed sound than what is typically achieved with True Wireless earphones. The idea behind the new Topology Diaphragm was inspired by Dr. Fang Bian's Ph.D. thesis which states, "Different Nanomaterials have differing structures and each of those materials has its own properties." Therefore, by carefully controlling the diaphragm surface structure we can yield different results that are superior in acoustic performance to a degree previously unobtainable. ANC Deep Noise Cancellation Immerse yourself in your own world of sound The microphone accurately identifies noise, generating a reverse signal that reduces noise up to -35dB. Charging case designed to accommodate most silicone tips, including larger sizes. Most true wireless earphones cannot be charged when using larger-size silicone tips. The Svanar Wireless increases the internal space of the charging case, so there is no need to replace the silicone tips repeatedly when charging the earbuds. Earbuds may be charged up to three times before needing to recharge the battery case. Touch Operations Press and hold the right earbud for 3 seconds to turn on the Al Voice Assistant (Note: the device needs to support the Voice Assistant function.)