The GSM4000u Micro GSM Listening Device is the pinnacle of GSM listening technology packed into an incredibly small package just 43 x 34 x 17mm. Just insert any SIM card, call the number and you will hear exactly what is going on in your absence.

Its tiny dimensions means the GSM4000u can be hidden almost anywhere; in a home, office, car and is even small enough to be hidden inside a handbag or briefcase.

The GSM4000u offers the best possible sound quality thanks to new filtering circuitry and a new DSP (Digital Sound Processor). Your audio will be free of buzz and hum like so many other inferior GSM listening devices are plagued with.

One charge will have the GSM4000u ready for up to 6 days standby or 6-8 hours of quality listening. For long-term applications the unit can also be permanently connected to Mains Power.

Supplied with mains charger and protective carry case. This is the ultimate micro miniature listening device!