Features:
SMS Tracking on Google Map.
Software that is supported by an Apple application named Tkstar (downloaded for free from iTunes) or Google Maps to ensure you can always monitor where the tracker is.
Protect child, the elder, the disabled and pet, etc.
Provide peace-of-mind for travelers by tracking suitcases and other important items while traveling.
A SOS system works if the SOS button is pressed, a "help me" text is sent to all authorised phone numbers and monitoring systems.
It can be used in vehicle rental management or fleet management.
It is waterproof, lightweight, small, and sleek design.

Specifications:
Network GSM/GPRS
Band 850/900/1800/1900Mhz
GPS chip UBLOX
GPS sensitivity -159dBm
GPS accuracy 5m
Time To First Fix

Cold status  35-80s
Warm status  35s
Hot status  1s
Car charger

12—24V  input
5V   output
Wall charger

110－220V  input
5V   output
Battery Chargeable 3.7V 1000mAh Li-ion battery
Standby 240hours
Storage temperture -40°C to +85°C
Operation temperture -20°C to +55°C
Item dimensions 50 * 50 * 20mm / 2.0 * 2.0 * 0.8in
Item weight 44g / 1.60z
Package dimensions 12.9 * 7.4*6.3 / 5.1*3.0*2.5in
Package weight 167g / 5.9oz

Note:
Please charge 12hours at first use.
Insert SIM card in right way. Please put the unit outside and make sure the trademark side facing up.
Confirm your SIM card have calling, send SMS, GPRS function.
Confirm your SIM card have enough balance (money).
Confirm your SIM card can show caller ID and don not use the function of call forwarding.

Package List:
1 * TKSTAR Tracker
1 * USB Data Cable
1 * Screw Driver (for sim-card installation)
1 * User manual ( English )