Tetra Handset for personal security

The funktel FT4 S is equipped with integrated sensors for the automatic recognition of dangerous situations and the initiation of alarms.  A unique function allows indoor localisation in the event of an emergency. The comprehensive range of security features includes cyclic testing of sensor functions and an optional GPS module.
Specially developed for personal security and certified in accordance with German Employer’s Liability Insurance Association Rules (DGUV 112-139), the FT4 S offers, in combination with the funktel TSS TETRA Security System, the greatest possible protection in hazardous environments and for lone workers.


  • Integrated sensors for localisation and alarms
  • Automatic alarm modes—such as position, no-movement and time-dependent alarms
  • Automatic loss-alarm (by means of a tear-away switch) in the event of the user being overpowered
  • Manual alarms via separate, easy-to-reach emergency and warning keys
  • Area and room-specific localisation after alarm has been triggered
  • Immediate reporting of an alarm to the control point
  • Transmission of alarms to other mobile devices (e. g. personnel in the area)



  • Dimensions:          145 x 60 x 36 mm (without antenna)
  • Weight:                   325 g incl. Battery 2900 mAh
  • Protection class:    Water, dust and shock protected – IP 65 (water-jet 
                                     and dust proof according to IEC 60529)
  • Temperature range:   Operation: -20… +55°C
                                          Charging: 0… +40°
                                          Storage:        -30… +75°C (without battery)
  • Type of display:         high resolution 2.2” TFT colour display
  • Resolution:                240 x 320 Pixel, 262,000 colours, support for Chinese and Cyrillic character set
  • Battery:                     Lithium-Polymer, 3.7 V, 2900 mAh, incl. vibration
  • Operating time:          up to 24 h (5/5/90, without GPS), up to 33 h standby
  • Frequency range:    380-430 MHz or 410-470 MHz, others on request
  • Channel Spacing:    25 kHz
  • Duplex Spacing:      10 MHz (at 380-470 MHz)
  • RF Transmission power:    1 W, performance class 4
  • Class of emission:    25K0 / W7D / W
  • Receiver class:         A&B
  • Transmission power regulation:    3 steps of 5 dB
  • Sensitivity (stat. / dyn.):    -116 dBm (min. -112) / -107 dBm (min. -103)

Fully integrated sGPS Receiver    

  • Sensitivity:    182 dBw (-152 dBm) / 185 dBw (-155 dBm) (Acquisition / Tracking)
  • Accuracy:      5 meter (50% probability), 10 meter (95% probability)
  • Protocol:        ETSI Location Standard Reporting (LIP)