Globalsat TR-102 User Manual page 58

TR-102 page 58
When the device is turned on, it will begin to do the initialization
process, and you will hear a short "toot" sound from the speaker.
This is a normal situation, not a defect.
Please avoid storing the device in an excessive heat or humidity
place. Please do not leave the device in your car under the
direct sunshine with windows closed. A high temperature
environment may damage the device or even cause the battery
explosion.
When you use TR-102 to make a call, but the other party can not
be reached for some reason (not turn on, busy line, reject the
call), you may hear the voice that requests you to leave a
message in the voice box. If you don't want to leave a message,
please make sure to press the hang up button on TR-102 to
end the call, otherwise TR-102 will keep hanging on with the
voice box system and can not come back to standby mode.
Do not hold TR-102 to your ear when it rings! When you receive
a call, press the answer button to accept the call before bringing
TR-102 to your ear in order to avoid ear damage caused by the
loud ringtones.