There are a lot of wireless patio speakers on the market so, when trying to choose what to buy, it's helpful to narrow down which options you need them to have. After this, your search will be easier. You will then be able to focus on such things as warranties and prices.
One thing to consider is whether you want the speakers to be good for both indoor and outdoor use. If you want them especially for outdoor use, you need to consider where you are planning on putting them. For example, if they are going to be exposed to the elements, you will need to have speakers that will not be damaged and are resistant to water and cold.
Different models of speakers can also be mounted in different ways. Some have multiple ways that they are able to be mounted or can stand by themselves. Others have brackets to mount them that will permit them to swivel around 180 degrees.
Some varieties are decorative ones. There are some speakers which are made to look like lanterns, for example, and blend in nicely with the surrounding decor. Some may also include lights and can be hung or freestanding.
The range that you are going to need is an important thing for consideration. This can be affected by how much space you want covered, how confined it is and, for some, the proximity of your neighbors.
One of the most important considerations is how you are going to connect your music. There are some that are meant to work directly with MP3 devices. If you want to use an existing stereo system, unless it is a new one, it probably doesn't have built in wireless. So you will have to make sure that the speaker has a way of picking up the signal from the stereo.
The source of power for the outdoor speakers is another consideration. Some are battery operated, others use battery packs that can be recharged. All typically have the option of plugging them in, although this clearly will require the use of wires. Using an outlet will also impact where you are going to be able to put them.
Once you've made a list of all your requirements for wireless patio speakers, you will be able to shorten your list of which meet your requirements. At that time, you can consider such factors as which best fit into the budget that you've allocated for this purpose.