Not all systems on the market are stable in use, until now only the GSM box (compared to the GSM Card or Pen) had the best results in tests, but this new GSM Car Key product seems to be as successful as the GSM Box.
Our team have carried out countless tests with this new system and it seems to be quite successful: it is stable in use, the sound in the headset is of good quality, the battery life is good(up to 4hours) and the microphone captures well even the weakest sounds from the environment.
GSM Car Key with Earpiece is a dual band GSM Module, the frequency is 850/900/1800/1900 Mhz so it can work for all countries. The sim card slot supports only micro sim card. The transmitter range from GSM Car Key to Earpiece is around 30-50cm Build-in high gain microphone ensures your smallest whispers is transmitted to your partner.
Built in Rechargeable battery ensures talk time of up to 4hrs. The inside indicator can show the on/off and battery power (when charging, the indicator will blink). When charging this device, make sure to turn it “ON”.