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SPI offer all the equipment you need to effectively conduct audio surveillance in a building or vehicle. The 'Microcell' is a self contained microphone, power supply and transmitter available in both UHF and VHF frequency ranges - all housed in a package the size of cigarette lighter. If you want audio surveillance with the added benefit of voice activation, look no further then the 'VOX Micro Tx', with user adjustable level activation. The 'Tilt Switch Transmitter Tx' was developed for installation in a telephone handset. The unit will activate when the handset is held to the ear and de-activate when placed down, helping to maximise battery life. |
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 cost effective audio surveillance |
In a grey aluminium die-cast box, both the single and six channel versions of the 'Repeater Station' provide a sturdy and reliable solution to increasing the range of a required transmission.
| Microcell | model dependent |
| Power supply | 3.6V battery, 15-20mA |
| Dimensions | - |
| Frequency range | 125-465MHz |
| Modulation | FM, deviation 2.5-5kHz peak |
| Power output | 8-10mW |
| VOX Micro Tx | model dependent |
| Power supply | 3.6-9V battery, 25-35mA |
| Dimensions | 51 x 25 x 10mm |
| Frequency range | 380-470MHz |
| Modulation | FM, deviation 5kHz peak |
| Power output | 10mW for 3.6V, 30mW for 9V |
| Tilt Switch Transmitter Tx | model dependent |
| Power supply | 3.6V battery, 20mA |
| Dimensions | 30 x 13 x 4mm |
| Frequency range | 380-470MHz |
| Modulation | FM, deviation 4.5kHz peak |
| Power output | 10-15mW |
| Repeater Station | model dependent |
| Power supply | 12V DC, 1.5A |
| Dimensions | 220 x 120 x 80mm |
| Frequency range | 149-205MHz |
| Modulation | FM |
| Power output | 5W |
| Channels | 1 or 6 |
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