This is a base for a Garmin mount that attaches to a smartphone case with 3M adhesive tape on one side (only the items in photos 1-2 are for sale; the other photos show optional add-ons). Although it looks like there are two in the photos, they are just taken to show the front and back, and only one will be shipped. By attaching this to your smartphone case, you can directly attach your smartphone to a Garmin mount. This is highly recommended for those who find a Garmin cycle computer to be excessive or expensive. Smartphone ------ Smartphone Case ------ Adhesive Tape ------ Base (Total thickness 8mm = 3mm protrusion + 5mm base) ------ Garmin Mount This is a Garmin mount base, approximately 40mm square with rounded corners, for smartphones and smartphone cases. The 3M BHV adhesive tape is of high quality and unlikely to peel off easily. When attaching, it's best to first simulate the direction of the mount without removing the adhesive backing before sticking it on. An optional 90-degree rotating Garmin Edge bicycle computer mount that can be attached and detached from the stem is available for an additional 940 yen (photos 3-7). GARMIN Mount Garmin Mount Attachment Base Uber Delivery