quality silicone material used in mask edge and strap make the mask comfortable to wear for long periods of time; and elastic silicone band with fixed buckle provides secure wearing. [Convenient Design] The whole mask is easy to clean for day to day wearing; the filter is replaceable and effortless to change. [2 Manners of Wearing] There are optional wearing ways(earhook manner and head-mounted manner) for you to choose, meeting individual habit and demand. Specifications: Color: White Brand: Material: Plastic+Silicone Anti-haze Level: N95 Battery Type: 3.7V Lithium Battery Battery Capacity: 1000mAh Charging Time: About 4 hours Working Time: About 4-6 hours Item Size: 8.83*7.1*10.6cm / 3.5*2.8*4.2in Item Weight: 185g / 6.5oz Package Weight: 275g / 9.7oz Package Size: 10.2*10.2*14.8cm / 4*4*5.8in Note:  -1pcs filter can be used for 14-21 days in mild contamination; approximately 7 days in serious pollution. -This product is not suitable for use in some cases, like in water, in high temperature environment, in anoxic condition, in environment with harmful substance reaching reaching life-threatening levels, etc. -When the product is not used for a long time, the switch should be in the "O" and it is recommended to charge once three months(charging time is about 4 hours; working time can be 4-6 hours). -Please clean the mask inside before wear it. -Electric air-purifying mask only, other accessories are not included. -The product is manually measured. If there are deviations in measurement, please refer to the actual product. -Due to photograph light or other reasons, the item in picture and material object may have slight difference, please in kind prevail.  Packing List: 1 * Electric Air-purifying Mask 1 * Charging Cable 4 * Filters
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