Features 1. Type: Handheld 2. Sound field strength: Combined type 3. Directivity: Supercardioid 4. Energy conversion principle: Electrical type 5. Companding technology to suppress noise and improve voice quality 6. Automatic frequency control (AFC) function 7. Support pilot technology to effectively improve the success rate of switching between different carrier frequencies 8. Support automatic power-off function, automatically shut down when the microphone is turned off 9. Support opening microphone instruction function 10. Support charging indicator function, the red light is on during charging, and the red light is off when fully charged. 11. Support charging protection function (overcharge, overdischarge, short circuit protection) 12. Charging interface: Type-C 13. High-sensitivity dynamic microphone core 14. Impedance: 550ohm Specifications 1. Material: ABS tube body 2. Modulation method: Digital frequency modulation 3. Transmitter frequency range: 266.85MHz (A channel 763.4)/268.65 (B channel 765.4) 4. Receiver battery: 18650 battery (battery not included) 5. Transmitter battery: 18650 battery (battery not included) 6. Receiver audio port: 6.35mm (with 6.35 to 3.5mm adapter) 7. Frequency bandwidth: 50MHz 9. MAX frequency deviation: 48KHz 10. Working distance: Greater than or equal to 30 meters 11. Distortion: Less than or equal to 0.5% 12. Signal-to-noise ratio (S/N): Greater than or equal to 90 dB 13. Frequency response: 50 Hz-15 kHz Package list 1. Receiver x 1 2. Transmitter x 2 3. Anti-slip ring x 2 4. Charging cable x 1 5. Adapter x 1 6. Wind shield x 2