Two Kenoid speakers with a built-in amplifier and sound control. They were installed on my boat and are working 100%. Try them before you buy. The sound is strong and excellent. Of course, they operate on electrical power via wire plug 🔌 or battery. The recorder has Bluetooth and a USB input. You can use them indoors, in a retreat, or they can be installed on a boat or car. The price is reasonable due to my lack of need for them.