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 Plug diameter: 3.5mm Wired Headphones Earplugs/earmuffs material: ABS Headset cable material: TPE Wearing method: Earplugs Style: Creative Design