Powerful 2watt Inductive MP3 Player Wireless Inductive no Bluetooth MP3 Box Neckloop Micspy Earpiece Complete Kit Exam student Invisible Keywords: Distance 40cm Power 2 watt Microphone 20db Battery Type 180 mah Battery Life 4 hours Warranty 12 months How to Start? Load the battery in the earpiece and put earpiece into ear canal. Turn on the MP3 player Box. Use the remote to change tracks, and Play and Pause them, as you need. Hold the MP3 player near your ear or on your desk (max 40 cm from ear) and play music files. The earpiece will receive signals and reproduce sound into your ear. Package Includes: 1 x Wireless earpiece ( 218 ) 1 x MP3 player Box (white) 1 x Remote control 1 x Recharge cable 1 x 337 battery Smallest and strongest inductive MP3 player in the world! You can play, or record files to your TF card. An inductive MP3 player is a great solution for hidden communication. MP3 player consists of insulating inductive coil, microphone and strong rechargeable battery which allows you to listen to your prerecorded files during your exams. With the wireless remote control you can control your MP3 player from your pocket. Built-in Next/Prev, Play/Pause keys are great for playing voice clips. No one will ever know that you are listening to your prerecorded files. The inductive coil creates a magnetic field and drives receiving coil inside an invisible earpiece which must be located within magnetic field.The radius of magnetic field created by inductive coil is approx 40cm. The MP3 player Box has a built in microphone, so that you can recorder your notes without a computer. For storage it uses TF card (not included). If the invisible earpiece is within magnetic field, you will always hear clear sounds.