Genius SP-925BT Brown V4.0 Bluetooth Stereo 2X5W Surround Sound, Built-in Mic (Brown) SP-925BT, built with a state-of-the-art CSR chipset, streams music wirelessly from any Bluetooth-equipped device, including a wide range of smartphones, tablets and laptops. When turned on, SP-925BT will enter into pairing mode and enable your mobile device to pair with it without pressing other buttons. If it was previously paired with a mobile device nearby, it will also connect to it automatically once turned on. Two built-in 5-watt speaker drivers plus a passive radiator base driver subwoofer deliver great stereo sound and is complemented with an extra bass effect. With the integrated AUX-in function, SP-925BT is ready to be plugged into a device and play if a wireless option is not available at the time. With the built-in microphone and call-answer button, you can answer a call and turn on the microphone to give you a hands-free call environment.