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. Bluetooth 5.2 with LDAC HD support Experience the best in wireless with the latest Bluetooth 5.2 Audio and video synchronization, low latency, stable and continuous connection and the Svanar JR supports LDAC HD lossless sound quality transmission. ANC Deep Noise Cancellation Immerse yourself in your own world of sound. Svanar Jr's 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 Jr increases the internal space of the charging case, so there is no need to replace the silicone tips repeatedly when charging the earbuds.