The newly developed GSM BOX has a built-in dual band GSM module that works in both of Four Band mobile phone networks.
It provides two-way covert communications via mobile phone networks.
Once inserted a GSM SIM card and turning on the power, it will automatically pick-up calls from any mobile phone or telephone.
The powerful inductive coil will create strong signals to drive the earpiece within 60-80cm distance.
It has a 35dB top sensitive microphone that ensures your partner will hear even when whispering, while the GSM BOX is hidden under the clothes.
The GSM BOX has a built-in rechargeable 900mAh battery. It supports more than 4-5 hours Talking time, or 48 hours Standby time.
