Wireless receiver - latest version Bluetooth 5.0 HIT latest standard aptX LL Super high-speed audio transmission with a minimum <40ms delay ensures that the Bluetooth wireless device delivers sound synchronized with the image. With aptX LL, you can enjoy the freedom of wireless networking in applications such as gaming and watching movies. NFC proximity support makes it easy to pair any number of smartphones quickly and seamlessly. Thanks to this, everyone can quickly share songs from their smartphone. Very useful feature for a party. Bring your audio-video setup to life, add wireless technology connectivity in Bluetoot 5.0 Adapter Bluetooth can be connected to any A/V receivers and any speakers with a standard 3.5mm jack or 2RCA ports,ideal for home theater, stereo systems and car stereo sets,also suitable for iphone, ipad, ipod Touch,Android smartphones and devices. With 3.5mm and 2RCA connection options, you can enjoy your music wirelessly on 2 speakers at the same time. The receiver supports standard BT 5.0 connectivity, A2DP, AVRCP, HFP, HSP protocols and SBC, AAC, aptX, atpX LL encoding standards. Adapter supports connection up to 10 meters. The set includes: Audio adapter Cable RCA - jack Cable jack - jack USB charging cable User manual I sell a new and unused adapter. I use my copy and am happy. The second device was purchased as a backup for another transmission and receiving set.