Catalog number: MM4000-BK Features: ●These earplugs cancel out noises such as car noise and machine operation sounds, helping you concentrate while studying or working. ●Even when wearing them, you can clearly hear important "voices" such as announcements and calls. ●The noise canceling level can be adjusted to two levels, "strong" and "weak," and the "external sound capture mode" allows you to hear surrounding sounds even while wearing the earplugs, so you can switch modes to suit your surroundings. ●Dustproof and waterproof to IP54 standards, they are resistant to rain and dust. Specifications: ●Type: Black ●Cord: Approximately 60 cm ●Size: One size fits all ●Color: Black ●External dimensions: <Battery box> Approximately 61 (W) x 15 (D) x 26 (H) mm (excluding clip) ●Cable length: Approximately 60 cm ●Weight: Approximately 30 g (including clip and cable, excluding batteries) ●Main materials: ABS ●Set contents: MM4000 main unit, clip, ear hooks, earpieces (XS/S/M/L x 2 each), instruction manual (with warranty) ●Power supply: 1 x AAA alkaline battery (sold separately) ●Continuous use time: Approximately 85 hours (in strong mode) ●Noise canceling level: -20 dB (in strong mode) ●Waterproof and dustproof rating: Equivalent to IP54 ●Precautions for use: Music cannot be played with this product.
