Easy spy kit includes new Bluetooth Transmitter and Spy Wireless Earpiece. Unlike other types of Bluetooth Headset, this new Bluetooth Gasses allows you to hear clearly through spy invisible earpiece.
eBay
This item makes secretive correspondence conceivable when it is badly arranged to uncover earpieces. Invisible wireless earpiece receives signal by an inductive loop across electromagnetic fields;. For example; Surveillance, VIP Protection, Investigation, etc.
eBay
Distance between GSM phone and earpiece:20-50cm. --Pen weight:G.W 55g,N.W 25g;Earpiece:G.W 5.8g,N.W0.8G. This item only GSM Pen transmitter. One GSM Pen transmitter supports multiple earpieces. You may using two earpieces with one pen to get better listening effects.
eBay
Quad-Band GSM Card now is powered by new 4 Watt audio amplifier and now offers more powerful output audio signals. GSM Module allows you to use device independently without mobile phone. Just insert the SIM Card in device. The most popular Spy Invisible Skin Earpiece. After use it you can enjoy advantages of stable micro speaker, clear audio voice output. It is an earpiece with skin body and black end. Earpiece have build-in mini receiver (speaker) and also have high quality and sensitive inductive coil.
eBay
Mini wireless earpiece is a micro-mini wireless inductive receiver that transforms audio signal through electromagnetic induction. These products make covert communication possible when it is inconvenient to expose earpieces.
eBay
2pcs Earplug. Invisible wireless earpiece receives signal by an inductive coil across electronetic fields (like a radio). This is the smallest wireless earpiece in the world. Perfect for any occasion and easy to use.
eBay
218 Micro MINI Wireless Spy Hidden Invisible Covert Magnetic Earpiece Earphone Earbud. This mini earpiece is an electromagnetic wave inductive and receiving device with a micro earpiece designed to fit exactly in ear canal for secret communication.
eBay
The powerful inductive coil will create strong signals to drive the earpiece within 60-80cm distance. 1x Spy Earpiece. 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.
eBay