Sennheiser MM450 bluetooth headphones with noise guard ?

Hello, -Sennheiser MM450, -High end, bluetooth headphones with noise guard system. -What that system does is eliminates ambient noises. It makes a huge difference on a plane and tube. -You can fold them to ease storage in backpack etc... -Battery lasts for hole day or more. -I used them for 4 months. -Perfect condition -Box, charger, cables included I am at work till 6PM, if I am not picking up phone please text me and I will get back to you.