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Description2.4G Two Way Wireless Tour Guide System ( 1 Handheld Transmitters + 20 Earhook Receivers ) Communication System Audio Conference Communication Headset For Teaching Meeting Feature: No plug into ear, sanitary Charger 2 hours, can work 23 hours ! Allow 2 speaker to speak at the same time The channel of all the receivers can be adjusted together by transmitter One click to turn off all receivers One click to make all the receivers mute It can be use worldwide Light weights,easy to carry. 9999 Selectable 2.4GHz licence-free world-wide channels accommodating hundreds of groups working on the same place as long as they are on different channels Specification-ATG-680 Transmitter ATG-680T Receiver ATG-680R Frequency Range 2400~2483MHz Frequency Range 2400~2483MHz ID Number 9999 ID Number 9999 Supply Voltage DC3.7V Supply Voltage DC3.7V Frequency Stability 0.001 Frequency Stability 0.001 SNR 80dB SNR 80dB Size 97*63*18mm Size 65*58*11mm Weight 70g Weight 18g Working time 25 hours Working time 23 hours Lithium specification 3.7V/1300mA Lithium specification 3.7V/380mA Modulation frequency offset 320KHz Modulation frequency offset 320KHz Working distance 150 meters Working distance 150 meters Power supply Built-in lithium battery Power supply Built-in lithium battery Transmitting power 50mW Frequency Response 4KHz Total power dissipation 230mW Receiving sensitivity -90dBm Package Included:
1x Transmitter
1x Clip-on Micphone
1x Headsetmicphone
1x USB Cable
20x Receivers
20x Earphone
20x Lanyard
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Category: Musical Instruments:Pro Audio Equipment:Microphones
Location: Leicester