Specifications:
Working mode: GSM / GPRS dual-band 900/1800MHz or 850/1900MHz GPS 1575MHz
appearance: sports watch
Appearance Dimension: 65 * 46 * 17
Case Material: PC + ABS
Key: Switch machine button, MODE button, SOS key, two phone keys
USB Interface: Mini USB (12PIN), charging / headphone / DATA
SIM CARD: Built-in
Built-in MIC: Call Monitor
Screen: OLED 128 * 128
Power Supply: 3.7V replaceable rechargeable 450-500mAh Lithium-ion battery, 5V charging input,
Headphone: 12PIN USB interface, with a MIC
Standby: about 20 hours
Current consumption: Communication time: average current 250mAh 
                                   Following Standby: 5mA (province-point mode) 
Surrounding environment: 
                                   Work environment: -30 ~ +70  
                                   Storage environment: -40 ~ +80  
                                   Working humidity: 20 ~ 90% (no condensation)

Function:
1 support  GPS automatic ajust time ,continuous follow function
2 support alarm and overstep area alrm
3 support fast call with two keys and SOS key .
4 follow up the scent without disturb personal life .
5 can send message to find the one's position .
6 use SOS key can send one's position to the SOS centre .
7 with MIC can monitor one's activity .
8 standby 60hours
9 display speed/coordinate/height above sea level
10 support stopwatch function
11 support alarm clock
12 support recording track 
13 record coord system :can offer 24 groups coordinate what message you want for you
Be suit for children ,elder and handicapped .