This earpieces can work with cvk 400 poker analyzer, it has a special locked frequency, even another players wear the wireless earpieces, they can not hear anything. Wireless Earpiece is also known as deep canal (external auditory canal type) miniature wireless headphones, micro headphones, small ears, microear etc. It has transmitted signals to answer phones, walkie-talkie, PHS, voice recorder, MP3, Walkman, radio, etc., replacing all the wired headset.
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Patel Nagar, Delhi