Introducing RYOBI Score. This 2-Piece set contains one P760 Primary Wireless Speaker and one P761 Secondary Wireless Speaker. Both speakers feature SKAA technology which allows up to 5 speakers to connect instantly. By connecting first with the Primary Speaker via Bluetooth, 4 other add on speakers can connect to the primary speaker instantly, using SKAA technology. These add on secondary speakers only work when the primary speaker is present. With up to 150 ft. of SKAA range, these speakers can be placed virtually anywhere in the home or on the job site and can still connect whether there is a wall separating them or not. The primary speaker also features an integrated FM tuner with 5 pre-sets and an integrated auxiliary port for more listening options (P760 Primary Speaker ONLY). Each speaker has independent volume control so you can set your preferences as needed. Each speaker features a high quality driver and passive radiator, so you will always receive clear, robust sound. Additionally, each speaker is equipped with a metal bar for convenient carrying, hanging, and storing of your device. Not only are these speakers compatible with any RYOBI ONE+ 18V battery, they also include an AC power adaptor that allow you to use electric power as well. See below for more details.