Bluetooth Transmitter / Receiver, Kuman 2-in-1 3.5mm Bluetooth Audio Receiver, Bluetooth Car Kit, Wireless Audio Adapter for Home Audio System Bluetooth-enable all 3.5mm media devices (enable Bluetooth receiving: speakers, headphones and more; enable Bluetooth transmission for: MP3, CD/DVD players, e-readers, TVs and more). Supported Bluetooth profiles: A2DP; Operation range: 33ft/10m. Built in battery for portable use. Simple Operation: one-button switch to shift between transmitter(TX) and receiver(RX) mode. TX Mode: Plug In To Your Non-Bluetooth Device And Pair Up Your Bluetooth Speaker Or Headset. RX Mode: Plug Into Your Non-Bluetooth Speaker And Pair Up Your Bluetooth Phone Or MP3 Player. Package included: 1 x 2-In-1 Bluetooth Receiver and Transmitter, 1 x Micro USB charger cable, 1 x 3.5mm Audio cable, 1 x User Manual