Ending today, Pro Electronics Distributing via Rakuten offers the Bose QuietComfort 35 Series II Wireless Noise-Cancelling Headphones in Black or Silver for $303.95. Coupon code "PRO45" cuts that to $258.36. (You must be signed in to use the coupon.) With free shipping, that's $80 under last week's mention and the lowest price we could find by $41. (Most retailers charge at least $349.) They're reputed to be among the strongest noise-cancelling headphones from Bose, are Alexa-enabled, and feature a battery life of up to 20 hours.