micro-size completely-in-ear-canal wireless earpiece

There are two core components in the security kit: an induction receiver and an induction transmitter. The receiver is the micro earpiece, it receives signal only. The transmitter is a passive neck loop, it sends signal to the earpiece.

The passive neck loop transmitter can be various versions:

- the neck loop with a stereo plug - allows listening-only with a player OR allows 2 way communications using a cell phone if used with a Bluetooth clip / Bluetooth headset / Bluetooth dongle with a stereo jack. These are Jabra BT320s, Jabra BT325s, iTech Dynamic (R35, Radio, S35, S38 models) or any other widely available clip brand. Note that Bluetooth clips are not resold here and should be purchased elsewhere. You can also use this solution with a walkie-talkie if it allows connecting external stereo headsets;

- the neck loop with a specific cell phone model plug - is itself a usual wired headset for a specific cell phone model with a speaker removed and the neck loop put instead. Allows 2 way communications with a specific cell phone model only, i.e. Motorola, Nokia, Panasonic, Samsung, Siemens, SonyEricsson;

- the neck loop with a Bluetooth set - is itself a usual Bluetooth headset with the built-in neck loop. This is a limited edition for a retail small quantity buyers only. This is basically the same as the loop with stereo plug + the Bluetooth clip with stereo jack. Allows 2 way communications with a cell phone.

Please study a drawing to understand an overall principle better.

Please see pictures of ready to use solutions.

The micro earpiece is inside your ear canal. Signal sent to the micro earpiece by any version of the transmitter is relatively weak, that means the transmitter and the micro earpiece must be within relatively short range. Therefore the transmitter loop is designed to hang on your neck or on shoulder (less preferred).

Earpiece dimensions and tolerances:

X: 6.0 millimeters (0.24 inch) (+/- 0.2 mm);
Y: 6.0 millimeters (0.24 inch) (+/- 0.2 mm);
Z: 9.1 millimeters (0.36 inch) (+/- 0.2 mm).

The micro earpiece is protected from cerumen (ear wax) with a built-in sponge at a sound output side of the unit. Ear canals should always be thoroughly cleaned. Clogging of the sound output of the micro unit with fat is not covered by warranty because is caused by obvious infringement of exploitation terms. Normally the sound output must never get clogged with the cerumen.

A battery power is the smallest industry watch battery SR416SW or 337 type which is widely available. The power is enough for 24 hours average earpiece work.

The micro earpiece includes GSM and 50/60 Hz power lines noise suppression circuits. It is allowed a presence of a very low background hissing during micro unit operation, a noise if the earpiece is close to power electronic devices, very close to the cell phone, the earpiece can also pick up a weak signal from radio line wires.

The micro earpiece body colour can be grey or brown.

Please note if using two micro earpieces, they will not produce the true stereo, because both the earpieces will produce the same sound.

The neck loop with a stereo plug is a passive induction transmitter with a 3.5 mm stereo plug. This is a passive device, i.e. it does not require any additional battery power, but an output signal of your sound producing device. Itself, it does not include any microphone, therefore it is suitable listening to audio only. The transmitter loop is designed to hang on your neck. The transmitter works with any 3.5 mm stereo jack device (players, Bluetooth clips/headsets/dongles, radios, walkie-talkies, computer sound cards, etc.)

The loop of the passive transmitter can be grey or brown.

Please note, you should not expect an actual performance volume of the security kit to be the same loud as you, perhaps, do usually listening to music. This would be just enough to hear clearly under normal room environment.

The passive transmitter will not produce the true stereo sound, because both channels are mixed.

Each passive transmitter channel (left and right) is electronically independent and is comparative to usual wired headsets in resistance.

You can acquire two way communications with the neck loop with stereo plug if using it with the Bluetooth clip/headset/dongle with stereo jack or with any 2 way radio (walkie-talkie) with stereo jack.

Widely available Bluetooth clips and walkie-talkies generally include omni-directional microphones quite sensitive for use under not loud environments. Some walkie-talkies have a voice activated feature (VOX) instead of a push-to-talk (PTT) button and allow plugging an external microphone as well. The list of Bluetooth clips with stereo jack includes, but not limited to: Jabra BT325s, iTech Dynamic R35, Radio, S35, S38, etc...

Another variant of the passive induction transmitter is a neck loop with specific cell phone model plug. This is a passive device, it is fully powered by an output of your cell phone. It includes a microphone and an answer button, therefore it allows 2 way communications. The transmitter loop is designed to hang on your neck.

The loop of the passive transmitter can be grey or brown.

A range of cell phone brands includes Motorola, Nokia, Panasonic, Samsung, Siemens, SonyEricsson. Please see photos of available plugs for cell phones sockets.

The passive transmitter will not produce true stereo sound, because both channels are mixed.

The neck loop with a Bluetooth set includes a sensitive to whisper microphone and communicates two-way with a cell phone. The Bluetooth transmitter and the cell phone must be within usual to Bluetooth 10 meters direct visibility range. The distance must be less if there is no direct visibility. The transmitter loop is designed to hang on your neck.

The Bluetooth transmitter includes a transmitter loop, a microphone, volume adjustment buttons, call answer/call end/call reject/call hold/voice dialling/last number dialling capabilities. An ear hook is not used in this application and is removed.

This is generally a usual Bluetooth headset, but modified with the neck loop transmitter to send signal to the micro earpiece.

The microphone is directed upwards for the best whisper detection.

The neck loop colour of the Bluetooth necklace is grey.

The Bluetooth transmitter is compliant with a Bluetooth specification 2.0 + Enhanced Data Rate (EDR), supporting 'Bluetooth headset v1.2' and 'Bluetooth hands-free v1.0' profiles.

This is a one channel audio. Using newer Bluetooth standards (like A2DP stereo) is considered useless in the micro earpiece application.