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user manual

3G listening unit

1

st

 Start up

1.  Insert the nano-simcard, connect the battery and wait for 1 

minute for the device to bootup.

2. 

Call the unit and let is pick up your number. 

3.  When sending commands to the unit, always wait for about 

10 – 20 seconds before the unit will send you the command. 
It’s important to have the SMS activated with “SMS1”

Name

Command

Command values

Description

Voice detection

VOX

0 - OFF 1- ON

(send SMS VOX1 or VOX0) to activate or deactivate.

Voice during phone 
call (Gain)

Simply, for increasing the signal from the microphone, you 
use following commands, pressing on the keypad: #01, 
#02, to #09 … wait in between the pressing of DTMF tone.

Sensitivity for VOX 
detection

SENS



0 - OFF
1 - highest
199- lowest

The higher the number the more noise is needed to acti-
vate. We recommend about 30 for human voice.

VOX sensitivity 
hangs up the phone.

VOXSENS



0 - OFF
1 - highest
199- lowest

This command will hang up an already dialed phone call, 
if the noise does not go over a set threshold. The interval 
is 2 minutes. 

This function is useful especially when you have a recor-
ding station, and you are not listening to the unit directly. 
It will save you hours of silent recording. 

Battery status

BAT

Returns percentage of battery

Ultra-Sleep Mode 
(for most battery life)

SLP

0- OFF
1 - 1 hour sleep mode
24 - 24 hours sleep mode

You need to activate VOX before, if you don’t, the unit will 
not wake up, even when there is a noise.
Else the unit is in Ultra Sleep Mode, when it will wake up 
in set intervals.
For example, SLP3 means that every 3 hours the unit will 
wake up. If you wish to turn this function off, you have to 
send SLP0 to the unit.

Factory settings

RESET

Factory settings = SLP0, VOX0, VOXSENS0, SENS50

Status of device

STATUS

The device will send you a status report, about all the 
commands, battery and signal strength.

Password settings

PASSWORD



000 - No password
001 to 999 - possible number com-
bination for passwords

ex: 777 - Password is set to 777

Choose your password, it always 
has to be 3 digits

If you decide to activate password you will have to use it 
for further communication with the device.
For example, if you set PASSWORD777 and you will want 
to change the sensitivity you will need to
do so like this 777SENS50

Setting a master 
number

SET420777123456 OR
SETCALLNUM777123456

Its advised to use the international format for setting the 
number for the 3G unit.

Deleting a master 
number

DELCALLNUM

This command will erase a master phone number.

Activate Phone call 
when password is on.

If the PASSWORD is on and you will dial the device, you 
have to punch in the combination 777 to activate the 
microphone.

Turn OFF led diode

LED

0 – OFF
1 - ON

Commands: 

 - variable

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