NIA S4000 Bluetooth Headphones deliver rich, high-quality stereo sound with advanced noise reduction technology for an immersive listening experience. Designed with soft over-ear ear cushions, an adjustable headband, and dual-device Bluetooth connectivity, the NIA S4000 Bluetooth Headphones provide exceptional comfort for music, gaming, work, and travel. Switch effortlessly between wireless and wired modes using the 3.5mm audio cable, enjoy hands-free calling with the built-in microphone, and experience reliable performance with up to 10 meters of wireless range.