T80B GPS wrist watch

Functions
(1)The most advanced GPS module in the world
(2) Works worldwide! Support 3 or 4-frequencyGSM 850/900/1800/1900 MHZ
(3)Two way for data transfer SMS,GPRS
(4)Real time tracking
(5) SOS button send out exact location for immediate rescue/action
(6) Independent SOS button which will send GPS information via SMS to 1 preset  cell phone number or send alarm to monitor center
(7)Continual location reporting
(8) is setted via SMS
(9) Low battery notification before the battery runs out!
(10) Speed limit alarm
(11)LCD screen show time and system setting
(12)Design for boy
(13)It has data logging function and records up to 20400 way points. 
(14)Set Geo-fence alarm. When the T80B move out preset scope, T30B will send one Geo-fence SMS to the SOS preset number. 
(15)With A-GPS Function.
 Technical parameter
GSM/GPRS:
(1) GSM AntennaBuilt in
(2) Protocol: Support TCP transmission
GPS:
(1)GPS AntennaBuilt in
(2) Accuracy1-5m  
Electronic:
(1) Operating Voltage3.4-4.5V
(2) Charge voltage4.5~5V
(3) Standby15mA
(4) Operating80mA
(5)Battery Li-ion600mAh
(6) Stand-by time48 hours
Package:
(1) Main Part Size 46mm*36mm*18mm