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

The device is designed to be used under crucial circumstances. This strongly requires experience. You will most probably fail in fulfilling your task successfully if ignoring a applied instructions. Please carefully examine device specifications, a user manual, a health notice prior to using the device.

Here is a step-by-step guide.

1 Instructions related to the micro ear unit.

1.1 Micro earpiece is a personal usage device and thorough ear canal cleaning is required each time prior to inserting the earpiece.

1.2 Two smaller size and one larger ear unit is supplied with each audio security kit. Everything is anatomically dependent. It is preferred to use two ear units simultaneously in both ears as well as to use a larger earpiece over using a smaller one, since this provides more sound output. This is, however, limited by two things: your ability to insert the earpiece deep enough and your ability to keep listening to sounds around you.

Variants:
a) a larger earpiece in one ear and a smaller in an another ear (the best output);
b) two smaller earpieces in both ears;
c) one larger earpiece one ear;
d) one smaller earpiece one ear (worse output).

1.3 Human ear canal is cartilaginous in the outer side and is a bit S-shape. To ease the insert, pull the ear cochlea up and back, this will make the canal straight. Insert the ear unit deep enough in order to hide it and to get closer to the ear drum to get enough sound.

1.4 Always insert the earpiece by yourself. Never allow other person to place the earpiece into your ear. You must feel it. This prevents damaging the eardrum in case of a forced press. Using a finger to put the ear unit is usually quite enough. Avoid using other means to push the earpiece deep and never move your head directed towards the earpiece being inserted or removed.

1.5 Removing the ear unit is easy. It is noticeably magnetic. You will be able to remove it with any metal stick of a similar diameter.

2 Notes related to the headset core.

2.1 Powering.

2.1.1 The headset is usually used under important circumstances. Power quality is significant in this application. Always use a new 9V battery or fully charged accumulator.

2.1.2 Long life / heavy duty alkaline batteries is the most popular choice. Besides alkaline, lithium batteries can be used, rechargeable NiCd/NiMH/Li accumulators are also fine. Cheap salt 9V batteries (carbon-zinc, 6F22 type) do not work in this application since they do not allow required discharging rates.

2.1.3 For reference, at average voice application of the headset an alkaline battery is enough for 3 hours of a continuous duty operation. Lithium batteries are about 3 times more capacitance than alkaline and can be used a pair of times.

2.1.4 Sometimes, a battery is not fixed reliably for some reason and terminals fluctuate in a battery clip. It is suggested to tighten the battery snap by putting an adhesive tape over it.

2.1.5 If powering with another source, never exceed the 20V max limit to avoid permanent damage the the electronic circuit.

2.1.6 Upon putting battery, constant orange light should appear on the headset board.

2.2 Setting wireless.

2.2.1 Bluetooth devices require pairing prior to the first operation. Pairing is needed only once, unless you don't switch to another phone (player, walkie-talkie, etc.)

2.2.2 To set up a pair, long press the button (1) (hold it for about 5 seconds). The light should become blinking blue/orange rapidly. This means the headset is searching for a phone now. The same time make a search for Bluetooth devices in your phone. Headset name is SDC BC5. Once its found, pair it. Passcode is 8888. After pairing, connect the device as headset, set up as an allowed for automatic reconnect device, if your phone asks.

2.2.3 If the headset was already paired before, you should simply reconnect it by either selecting SDC BC5 device in your phone, or short pressing the button (1).

2.2.4 The headset and a cell phone must be within usual to Bluetooth 10 meters direct visibility range. The distance must be less if there is no direct visibility. This means the phone (player, walkie-talkie, etc.) should be somewhere behind you.

2.3 Understanding proper volume level set up.

2.3.1 Setting proper volume level is critical in this application. The audio amplifier embedded into the security headset is set up with a bit excessive gain level. This was done intentionally to allow the headset to work fine with any source of input audio signal (received via Bluetooth or through line-in).

2.3.2 The best volume is not the maximum and is not the minimum, it is usually somewhere in the middle. Too low can be quiet, and too high can be distorted. To test it exactly for you phone and exactly for your phone call partner, always set up an actual phone call and adjust the volume during conversation. Level should be set to maximum possible one, but the one which still do not make a so-called 'sound clipping' - a distortion when a level of signal is raised too much and waves are cut at peak amplitudes.

2.4 Main board functionality.

2.4.1 The main board should be normally placed in a pocket. Still away from cellphone to avoid noises. Battery goes the same place. Wires should be traced under clothes.

2.4.2 In the most of cases, by short pressing a button (1) on the board you can easily initiate a voice dialling feature. Middle (3 seconds) press initiates a last number dialling. Such functionalities, however, depend on your phone model and phone settings. Sometimes, these functions can be reversed (short is last number, and middle is voice dialling). Always remember that pressing the button (1) 5 seconds or more will force it into pairing mode.

2.4.3 Pressing the same button (1) during a call will end it.

2.4.4 Button (2) is volume down, button (3) is volume up. Sometimes, a cell phone volume and the Bluetooth kit volume are adjusted independently, sometimes are not. This is phone model dependent.

2.5 Using microphone.

2.5.1 External microphone should be hidden somewhere in your clothes. This must be fixed in place reliably. Using a pin is the simplest. Since microphone is very sensitive, remember to avoid contacting a microphone with your clothes, this can produce a noise.

2.5.2 Deliberate touching a microphone cap with finger produces a specific noticeable noise, this can be sometimes used for simple communications, however, using a beeper button is the best choice.

2.5.3 Avoid wearing too solid clothes for the best whisper detection.

2.6 Using beeper.

2.6.1 Long wire beeper button is designed to be placed under a feet toe. Use an adhesive tape to position the button exactly under a finger-cushion. Once pressed, it will produce a buzz into the radio transmitting air. This is quite useful for simple communications.

2.6.2 Smart men can use a Morse code, but, the most ingenious idea is to use the order of letters on cellphones and send a sequence of numbers in short/long beeps. A T9 vocabulary can easily identify such phrases.

2.7 Handling neck loop.

2.7.1 Induction signal sent to the micro ear unit is relatively weak in its nature, that means the transmitter (i.e. the neck loop) and the micro ear unit must be within relatively short range. So, the loop is designed to hang on your neck. Placing it elsewhere will affect listening.

2.7.2 The transmitter loop contains a set of wires which operate as a radio signal transmitting antenna. Never apply force to pull the loop to avoid breaking the wire.

3 Guides related to the cell phone or a 2 way radio.

3.1 Do not forget to turn off all sounds, alarms, reminders and a vibrating alert on your phone. You can more likely lock a keypad as well: this does not affect Bluetooth circuit buttons. Always set up pair and connect security headset and phone via Bluetooth before setting up your phone ring tones, sounds, volumes, etc. If your phone has a separate settings profile for headsets, this ensures it is currently active and that you are modifying this exactly profile settings.

3.2 Do not forget to raise an other side person's phone talk sound volume to the highest possible level for the best whisper recognition.

3.3 Set up an automatic incoming call answering on your cell phone. This allows you to pick up a call without need of pressing any buttons. Please note, some phones do not allow an automatic calls answering if in a silent mode profile. Instead, record quiescent with a phone sound recorder and set it as a ring tone.

3.4 Set up a last dialled number on your cell phone to the one you wish to call. You can easily dial the last number by pressing a button (1) on a headset board.

3.5 Set up your phone to connect to paired Bluetooth devices automatically. This allows a reconnecting any time if a connection is dropped accidentally.

3.6 If your cell phone volume and the Bluetooth set volume can be adjusted independently (this depends on an exact phone model, sometimes both volumes are automatically synchronized), you are suggested to set the phone sound volume to a low level and to adjust final volume with the Bluetooth headset board volume control buttons to maximum. This minimizes a risk of a telephone speaker to turn on if a connection is dropped accidentally.

3.7 Do not place a cellphone or a walkie-talkie the very same place where is the main electronic board of the headset is. Cellphones or walkie-talkies are a few watts power transmitters (that is much). If they are directly close to the headset, they can made sound output unstable.

3.8 Do not place a cellphone or a walkie-talkie too close (within centimetres) to headset's external microphone, this can invoke a buzzing noise.