GPS Watch Phone

We are offering gps watch phone.
Content specification
gsm module gsm 850/900/1800/1900 mhz quad frequency
gps sensitivity -163dbm
gps center frequency l1, 1575.42mhz
gps positioning accuracy 5-25m
gsm positioning accuracy 100-500m
speed accuracy 0.1 m/s
time accuracy synchronous with gps
gps datum wgs-84
hot start
warm start
max. Altitude 18000m
max. Speed 515m/s
gravitational acceleration
operating temperature -20â°c---65â°c
humidity 5%---95%
dimensions 64.5(l) x45.5(w) x17.5(h) mm (main unit)
weight 82g
voltage rechargeable 450mah battery
power supply dc5v
standby time 48h
buttons sos button for emergency aid; call 1, call 2, switch on / off buttons, interface switch button.