Amazon kicks off the week with the killer headphone sale we've been waiting for since Black Friday.

For the first time, Amazon is offering the Echo Buds for $89.99. That's $40 off and the lowest price ever for Amazon's Alexa-powered wireless earbuds.

The Amazon Echo Buds are excellent wireless headphones, and in our review of the Amazon Echo Buds, we liked the ability to use Alexa wherever we go. Amazon's digital assistant is much more useful than Siri.

The Echo Buds are IPX4 rated to withstand sweat and light splashes. (Like Apple's AirPods Pro). In terms of sound quality, they are not yet ready to compete with powerhouses like Bose and Sony (we found the volume levels on the low side), but they are not bad either. Especially at the current selling price. [Amazon has partnered with Bose for active noise cancellation in the Echo Buds. This technology does not provide complete silence, but it can reduce ambient chatter to a murmur. There is also an adjustable Passthrough mode that allows the user to change the volume of ambient noise. Battery life is up to 5 hours, and up to 20 hours with the charging case.