Professional Amplifier Audio Transmitter with Noise Cancelling Headphone Set

1. Plug type: straight plug 2. Headphone output audio source: PC/Hifi/TV/DVD/CD 3. Whether wireless: wireless transmitter 4. Uses: family party, large stage party, square dance, fitness, yoga, conference, travel, broadcasting, cinema, etc. 5. Plug diameter: 3.5mm 6. Plug: 3.5mm 7. Wire length: 3m 8. Horn diameter: 40mm 9. Sensitivity: 10dB 10. Frequency response range: 20-20000Hz 11. Distortion rate: less than 1% 12. Impedance: 32?? 13. Signal-to-noise ratio 75dB 14. Distortion rate: <1% 15. Frequency response: 30-20,000Hz 16. Transmitter power supply: 420MAH built-in environmentally friendly lithium battery, 9V/1A adapter power supply 17. Headphones must be connected to the transmitter for use 18. Countless headphones can be connected to one transmitter at the same time. The transmitter has 3 channels, and users can choose their favorite music as they like.