Features: OOTDTY brand new and high qualityThe internal antenna adopts a stable and mature PIFA antenna design scheme to ensure the stability and transmission distance of signal transmission, and the transmission distance can reach 10 meters.Built-in microphone make hands-free phone call noise cancellation provide high clear quality.Receiving technology: This receiver uses high-definition lossless receiving technology, so that wireless devices are as clear and fidelity as talking face to face.Wide applicability: This wireless receiver is suitable for home , speakers, car stereos, earphones and other equipment.Support equipment: This receiver supports wireless V5.0 version, supports stereo, and also supports Wireless hands-free function.Specifications: Material:ABSSize:As Picture ShownColor:BlackInterface: 3.5MMExternal Power Supply: USB power supplyWorking Frequency: 2400 (MHz)Bluetooth-compatible Standard: 5.0Effective Working Radius: 10mPackage Includes: 1x ReceiverNote: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.