Wireless Headset Microphone for Teaching Meeting

Features:
1: Use the 670 to 69OMHz frequency band (channel A: 682-690MHz; channel B: 670-680MHz), strong anti-interference. 
2: Adopt 24Bit/48KHz high-performance audio dedicated A/D and D/A processing. 
3: Use ID code + frequency for data encryption and frequency. 
4: With automatic mute and impact elimination circuit, to avoid the impact and noise of switch machine. 
5: The effective distance of wireless transmission is 20-50 meters. 
6: Simple operation interface,Very few adjustable parts, can completely avoid misoperation causedmalfunction. 
7; Very high pickup sensitivity, excellent sound quality, so that you can speak or sing easily. 
8: Multiple devices can be used at the same time without interference and frequency channeling. 
9: With power and wireless indicator lights. 
10.Support single frequency. 

Specification:
Transmitter technical Specifications:s:
1: Frequency range 670^690MHz. 
2: The number of channels is 10 (conservative value) each time when pairing, the ID code changes randomly, within the frequency range set by the manufacturer. 
3: Oscillation mode DSP chip frequency lock. 
4: Frequency stability 10ppm. 
5: RF power 10dBm. 
6: Audio frequency response 40~ 1 8000Hz. 
7: Distortion degree 0.5%. 
8: Battery Specifications: 3.7V lithium battery. 
9: 3 hours of battery life (depending on battery type and capacity). 
 
Receiver technical Specifications:s:
1: Frequency range 670~690MHz; 
2: The number of channels is 10 (conservative value) each time when pairing, the ID code changes randomly, within the frequency range set by the manufacturer. 
3: Oscillation mode DSP chip frequency lock; 
4: Rate stability 10ppm; 
5: Receiving sensitivity -95~-71dBm; 
6: Audio frequency response 40~ 18000Hz; 
7: Distortion 0.5%; 
8: SNR 90dB; 
9: Audio output 300mv (maximum); 
10: Battery Specifications: 3.7V lithium battery; 
11: 4 hours of battery life (depending on battery type and capacity); 
 
Package Included:
1 x Headset microphone; 
1 x Receiver; 
1 x USB power supply line; 
1 x 3.5 plug conversion