One Box Of 25 Disposable Protective Masks # AV-MASK-25 | FAS-AV-MASK Q075 Operating Temperature: -40F to +170F

Operating Temperature: -40F to +170F

The operator supplies 24-volt power to the receiver

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Built-in onboard 433 Mhz receiver

One Box Of 25 Disposable Protective Masks # AV-MASK-25 | FAS-AV-MASK Q075 Operating Temperature: -40F to +170FOne Box Of 25 Disposable Protective Masks # AV MASK 25 FAS AV MASK Pack of 25 disposable protective masks with multiple layers and blow out flame tested. Usage Method The nose line is outward and upward and the mask is unfolded by pulling one ear band with both hands. Buckle the ear belt behind the ear and adjust it to a suitable length. Adjust the position of the nasal bridge line between the index finger and the middle finger of both hands and press