1. 2.400-2.483GHZ, ISM Band/GFSK Modulation. Equipped With A Real-Time Feedback Monitoring Interface, You Can Connect Headphones To Monitor The Recording Effect. 2. Support 3mbps Rf Audio Data Transmission. Professional Circuit Structure, Strong Anti-Noise Interference Ability. 3. Support 48KHZ/16bit/Single Channel Audio Sampling. The Product Has A Built-In Microphone And Also Has An External Microphone Port. The External Microphone Comes With A Small Lavalier Holder, Which Can Be Easily And Quickly Fixed On The Chest Clothing, Making It More Flexible And Convenient For Users To Use. 4. The Minimum Audio Delay Is 12.5MS. 5. Wide Range Of Uses: Such As News Interviews, Film And Television , Character Interviews, Program Hosting, Teaching And Training And Other Film And Television Recording, As Well As Connecting To Mobile Phone Recording. The Recording Sound Quality Is Clear And The Sound Quality Is Excellent, Giving Users The Ultimate Recording Experience. Description: 1.Microphone Sensitivity: -38±2DB 2.Microphone Directivity: Capacitive Omnidirectional 3. Working Voltage: 3.3-5V 4. Working Current: Max100mA 5.Ambient Temperature: -15~65 Degrees 6. Frequency Range: 2.4-2.483Ghz 7. Transmitting And Receiving Distance: Less than or equal to 50 Meters 8. Transmit Power: -10~18DB 9. Receiving Sensitivity: -80DB 10. Frequency Response Range: 20HZ-20KHZ 11. Delay Time: 12.5MS 12. Sampling Rate: 48KHZx16BIT 13.Signal To Noise Ratio: 90DB 14. Distortion: 0.5%@1KHZ 15.Dynamic Range: 90DB 16.Charging Current: 400mAh 17. Product Charging Time: About 2 Hours 18. Product Usage Working Time: About 5 Hours 19. Wide Range Of Uses: Such As News Interviews, Film And Television , Character Interviews, Program Hosting, Teaching And Training And Other Film And Television Recording, As Well As Connecting To Mobile Phone Recording color:As shown Material:ABS Package Contents: 1 x Transmitter 1 x Receiver 1 x 3.5 Audio 3P Male To 3.5 Audio 3P Elbow Cable 1 x 3.5 Audio 3P Male To 3.5 Audio 4P Elbow Cable 1 x 3.5 Audio 3P Male Microphone 2 x USB Cable 1 x Instructions In Chinese And English Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.