1、ROTATABLE MIC: Ensures precise positioning and optimal noise cancellation, staying clear of the customer service representatives peripheral view while helping ensure that customers hear every word; Also, you can wear it on the left or right ear as you like. 2、COMFORTABLE TO WEAR: Made from ABS ear cushions, its high end and comfortable enough to wear all day, on your longest calls, especially for telephone intensive users, including formal customer care centers, help desks, telesales, and customer service organizations. 3、MOST COMFORT HEADSET: Ultra lightweight wired over ear headphones with adjustable headband to fit all head sizes, a flexible boom mic to suit your preference, soft and ear cushion enhance all day wearing comfort. 4、ULTRA LONG LASTING HEADSET: Accurate design, quality plastics, uni body headband construction, flexible mic boom make this headset with mic more long lasting and sturdier in use. 5、PLUG AND PLAY: No driver is required, plug and play, directly connect the headset to a USB or 3.5mm plug compatible devices, and the wired headset supports PC desktops and laptops. Item Type: Wired Headset Material: ABS Model: SY440MV Interface Type: 2x3.5mm (headphone + microphone)/USB Speaker Size: Approx. 30mm / 1.2in Impedance: 32Ω Sensitivity: 105dB Frequency Range: 20Hz-20KHz Microphone Size: Approx. 6x2.7mm / 0.24x0.1in Microphone Sensitivity: -38±3dB Microphone Impedance: 2.2KΩ Directionality: Omnidirectional 1 x Headset