Product information: Color: ME537 White (3.5),ME537 Black (3.5),ME537 red White (3.5),ME540D White (analog board),ME540D Black (analog board),ME540D red White (analog board),ME540 White (number),ME540 Black (number) Frequency range: 40 Processing Method: OEM Plug diameter: 3.5mm With or without microphone: Yes Wireless or non-headphones: wired headphones Earplugs/earmuffs material: ABS Packing List: earphone, inner stent, packing box Purpose: Universal Headphone output audio: Universal Plug Type: through hole Wire Length: 1.2 Headset cable material: TPE Wearing method: Earplugs Horn diameter: 14.2 Style: Creative Design