Geartist&reg; RT419 Wireless Bluetooth Stereo Transmitter and Audio Receiver (NFC/Apt-X) with 3.5mm Stereo Output 2-In-1 Adapter for iPhone 6/Plus/6s, Headphones, TV, Computer/PC, iPod, MP3/MP4, Car Stereo and More Geartist RT419 is APT-X technology, plays your music with outstanding CD quality sound wirelessly Simple one-button switch to shift between transmitter(TX) and receiver (RX) mode Portable (63.5mm x 35.3mm x 9.7mm) CSR bluetooth 3.0 with NFC, easy to connect and take for outdoor Operation range: 33 ft/10m (open space, no obstacle), battery life for TX mode: about 10 hours; battery life for RX mode: about 6 hours Package contents: Geartist RT419 Bluetooth Transmitter and Receiver, white/red audio cable (only connect with receiver device, RX vision), micro USB charging cable, protective sleeve, instruction manual