Enable wireless music streaming to any headphones by simply plugging them into the SAEM; S4 Bluetooth receiver and connecting wirelessly via your Bluetooth enabled device. The saem; s4 will also convert any device with a 3.5mm line in (AUX) jack to become a wireless streaming device. This may be your home hifi equipment, a portable speaker or your in car stereo system. Compatible with a2dp1.2/avrcp1.0. Bluetooth version a2dp1.2/avrcp1.0. Volume adjust. Includes saem; s4 bluetooth receiver charging cable quick start guide. Weight 13.2g.