Remax PD-BT533N Bluetooth Headphones - Immerse Yourself in Superior Sound!, Material: PC - Lightweight, Durable, Modern:, The headphones are made of high-quality polycarbonate (PC), which not only ensures lightness and durability, but also gives them a modern, stylish look. Stable Wireless Connection:, With 5.4 wireless technology, forget about signal loss problems. A stable, lag-free connection guarantees complete freedom.