Go-Des Wireless Audio Receiver, GD-BT104, Black

Hands-free bluetooth connection Supports Bluetooth stereo audio connection Direct access audio input Bluetooth 4.1 version + EDR Bluetooth distance: 10 meters 3.5mm stereo audio jack Connection between wireless speakers and 3.5mm headphones 4 hours uninterrupted stereo audio connection 4 hours non-stop talking Internal microphone Mic sensitivity + -42 db Output power 30 mW.