1. Wireless free recording, 2.4G wireless with good performance, stable signal, and real-time ear monitoring. 2. Microphone use: It adopts a 360 high-sensitivity omnidirectional pickup microphone with quick response and delicate sound pickup, capable of recording sound details. 3. Noise reduction sponge: It uses high-density, anti-pop noise reduction sponge to reduce surrounding environmental interference. 4. 3.5mm standard headphone jack. 5. Material: ABS. 6. Color: Black. 7. Package contents: - 1 transmitter. - 1 receiver. - 1 charging cable (Type-c interface). 8. Only the above package contents are included, and generally no other products are included. 9. Note: Light and different monitors may cause the color of the item to vary slightly from the actual product. The allowable measurement error is +/- 1 - 3cm.