SPECIFICATIONS
 
 
describe 1: 6802 mask has a battery life of 20 hours with anti-virus tank and threaded RD40 interface.
describe 2: 6802 mask has a battery life of 20 hours with a dust box and a three-jaw bayonet interface.
describe 3: 6802 mask has a battery life of 20 hours with a dust-proof and anti-virus tank and a three-jaw bayonet interface.
describe 4: HY01 mask has a battery life of 20 hours with anti-virus tank and threaded RD40 interface.
describe 5: HY01 mask has a battery life of 20 hours with a dust box and a three-jaw bayonet interface.
describe 6: HY01 mask has a battery life of 20 hours with a dust-proof and anti-virus tank and a three-jaw bayonet interface.