This is terrible, I can't use it. There are two parts, one which holds the phone, and one which attaches to the handlebars of your bicycle. Both parts work well on their own but they don't connect safely. There are four little tabs on the phone holder that are supposed to slide into the handlebar unit. However, these tabs are made from cheap plastic and are a bad fit. If you go over a small bump in the road the phone holder will easily disconnect from the handlebar unit and fall to the ground. Bye, bye cell phone! :-(
The only way to make this safe would be to use a strong glue to stick the phone holder to the handle bar attachment. Please don't waste your money buying this...!