Okra Portable Wireless Bluetooth Stereo Music Transmitter & Receiver 2-in-1 Adapter for iPhone,iPad,Samsung Smartphones Tablets Headphones TV MP3/MP4 Car Stereo & More - Retail Packaging Works as compatible 2-in-1 Bluetooth Music Receiver and Transmitter for phones, computers, mp3 players, tablets, etc Battery life for TX mode: about 11 hours; battery life for RX mode: about 6 hours Supported Bluetooth profiles: A2DP; operation range for RX Mode: 33 ft. / 10m. operation range for TX Mode: 16 ft. / 5m. Simple one-button switch to shift between transmitter(TX) and receiver(RX) mode. Package contents: Okra Bluetooth Transmitter and Receiver, 3.5mm audio cable, micro USB cable, instruction manual. And a FREE LIFETIME WARRANTY