These high-quality Bluetooth headphones have noise reduction technology and ultra-soft over-the-ear pads with an adjustable headband. Features Bluetooth 4.2 Active Noise Cancelling Headphones with microphone SD Card input FM Radio tuner High-fidelity stereo sound quality with fast stream low latency codec Ideal for TV/PC/gaming and cell phones Extended playtime up to 6 hours Additional audio line input Ultra-soft over the ear pads with adjustable headband Product Specification Bluetooth V4.2 Supported profiles: headset, handsfree Up to 6 hours playtime Drive: 40mm Impedance: 32ohm Frequency response 20Hz-20KHz What's in the box 1 x Tecnix Over Ear Headset 1 x Instruction Manual 1 x USB micro cable 1 x Audio line input cable