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Now on your PC screen, this is Only GSM Card Model This link include 2 model: 1)Full sets include earpiece, 2)Only GSM Card(You MSUT need an A780 or A680 electronic earpiece, cannot use magnet), please click small window for choose Package/List of Accessories:1x IMEI Unique New 4.5 W GSM-ID-Card No problem in any country, total 6 model you can choose. Also we have VIP Card model if you need NOTE: There are many fake products on the market, weak sound and cannot work in some country! 1x USB charger cable 1x Operating Manual, if you need. If order more than 10 units in one time, will get a good price. PRODUCT DESCRIPTION Once insert a GSM SIM card and turn on the power, it will automatically pick-up calls from any mobile phone or telephone. Two way covert communication via mobile phone networks Optimized inductive coil (Built-in)creates strong power for earpiece Size 85*50*4.5 mm 3-5 hours talking time, or 48 hours Standby time HOW DOES IT WORKS? The new developed GSM BOX has a buildin dual band GSM module that works in both of Four Band mobile phone networks. Once insert a GSM SIM card and turn on the power, it will automatically pickup calls from any mobile phone or telephone. The powerful inductive coil will creat strong signals to drive earpieces within 40-80cm distance. One pc 35db top sensitive microphone ensures your partner hear the whisper voices, even the GSM BOX is hidden under the clothes. GSM BOX has a builtin rechargeable 650mAh battery, supports more than 3-5 hours talking time, or 48 hours Standby time NMD-330 GSM-ID-Box, best gsm-box and most beautiful in the world, large volume long distance, mini size only 4.5mm smaller than an Bank-card.