You can record all necessary information prior to the event and then secretly listen to it,You don't need anybody's help while using MP3 earpiece set (in comparison to MWE and MWE Bluetooth where you communicate with your partner over a cell phone)In some situations cell phones are not allowed, though there are no restrictions regarding flash players,The transmitter does not need recharging (unlike MWE Bluetooth)
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Patel Nagar, Delhi