It is very easy to install on my 2019 Kona Electric. However my most recent purchases have not been nearly as stellar- both Teva Riva Mid insulated boots and the very recently purchased Teva Riva Arrowood E-vent shoes ran small (I wear US size 12 in 99% of all footwear, including Merrell, North Face, Keen, etc), yet both of these Tevas were running at least half a size small for US 12 and gave me rather unpleasant hiking experiences to say the least. The short sleeves aid in keeping me cool and comfortable as I sleep. Humbled. They were OK but, the sound wasnt that great and I wanted something better - just not something that would cost and arm and a leg. I am simply amazed how well Fiio has been able to harness the technology, and get such power out of such a small device. The actual length of each pocket can accommodate a larger foot, but the height and width dimensions make it impossible to easily store ladies booties, some heels, and certainly bulkier athletic sneakers. COVID PRICING: Like everything work-from-home related these days, it costs way more than it did pre-pandemic. I love them, and they fit well in my ears. I price checked and researching many products, from multiple places, and landed on this one from Amazon.