F.E.S. Elastic Support System FiiO’s exclusive F.E.S. (FiiO Elastic System) enhances diaphragm elasticity through a special textured design. This increases vibration amplitude, resulting in deeper, more dynamic, and flexible bass.Dual-Sided High-Density Magnet Array The dual-sided N52 neodymium magnetic array provides strong magnetic force, achieving high sensitivity of 92dB/mW. This allows the JT7 to be easily driven by portable devices while still producing full, energetic sound.Ultra-Light 318g Foldable Design Weighing only 318g, the JT7 is much lighter than most planar headphones. The four-axis ergonomic design ensures a comfortable fit for long listening sessions. It folds compactly for easy storage and travel.Replaceable Earpads & Headband The breathable mesh fabric earpads reduce heat build-up during extended wear. Both the earpads and headband are detachable for easy cleaning and replacement.Detachable Cable System Includes both a 3.5mm to dual 3.5mm single-ended cable and a 4.4mm to dual 3.5mm balanced cable, plus a 6.35mm adapter — ensuring perfect compatibility with various audio sources.