GPS Vehicle Tracker

We are offering gps vehicle tracker.key specifications/special features:
gsm frequency: 850, 900, 1800 and 1900mhz
gps chip: u-box 6
gps sensitivity:
cold start: -148dbm
hot start: -157dbm
time to first fix:
cold start: 26 seconds
warm start: 26 seconds
hot start: 1 second
working voltage: 6 to 30v dc
battery: chargeable 3.7v, 1200mah
static current: ≤50mah
storage temperature: -40 to +85°c
real-time online tracking via gprs
check car's real address (city and street) via sms
sms/gprs simultaneously
reply map link of current position
power-lost alarm
back-up battery low alarm
over-speed alarm
sos emergency alarm
movement alarm
car moves out, send sms/gprs alert
can be able to set via sms/tracking website
geo-fencing setup (in/out) and breaking alert
supports rectangular and polygonal types
gps signal lost and recovery alert
device lost gps signal, send last location to user immediately
voice wiretapping
monitoring voice remotely by cell phone (authorized only)
cut-off engine/oil immediately (standard)
cut-off engine/oil gradually for safety (optional)
save gprs cost function (optional)
auto-tracking by time intervals (via sms)
trackers name defined by sms
input/output ports trigger alarms
vehicles acc on/off, doors open/close status can be checked on website
command to switch on/off siren/horn sound via sms/website
used to threaten car theft
built-in 8mb flash memory
can save 60,000 way points
built-in backup rechargeable lithium battery: 1200mah
firmware upgrade over air
saves trouble to fix bug or upgrade to latest firmware for device
no need to take out device from vehicle
free gprs web online tracking
customized functions are accepted
standard accessories:
gps antenna
gsm antenna
sos panic button
relay (12 and 24v are available)
microphone
bundle cables
optional accessories: magnets and car alarm siren/horn.