1. The tags was embeded into cell phone, under emergency situation, the tags can be sending out the location signals.

2. Reader will received the signal at the range of 2 kilometer, showing the accurate position at the same time

3. All the details information will be showing at the researching helicopter's control center's PC

Below tag and reader's function and specification for you reference,

Tag specification:
1. DSSS
2. Multi Channel Co-operation working mode
3. Communication range>1500meter with 0db antenna gain
4. Tag ID can be changed
5. Broadcasting and point to point communication
6. Read & write data from or into tag
7. Read & change tag RF working parameters in air
8. Communication with high speed moving tags(.300km/h)
9. Low battery level alarm
10. High density tag handing capability
11.Support read &write with password
12. Data rate adjustable
13. Capability to control devices connects to a tag
14. Support to run program pre-set in a tag
15. Water proof packaging.

Tag working parameter:
1. Range: Long range>1500meter, short range>150meter
2. Temperature range: -35-85degree
3. Transmit Current: 260-35mA
4. Receiving current: 35-30mA
5. Stand by current: 1scend sleep period<6uA
6. Working Voltage: 2.7V-3.6V DC
7. Antenna Type: PCB or (External antenna optional)
8. Battery life: 3-5years (depending on tag working mode)
9. Sensitivity: -104dBm-97dBm
10. RF power out pu:t 20dBm-4dBm
11. Data rate(adjustable): 16-250kbps adjustable
12. Available storage space: 256bytes(can be expanded)
13. Maximum packet length: 150bytes
14. Battery: 22000mah high power, high capacity

Reader Functions:
1. Support remote working parameter set up(in air)
2. Multi-Channel working capability
3. Support cable connection (RS232/RS485)
4. Support RF connection(GPRS optional)
5. Reset software
-Change ID
-Adjustable transmission power
-Change User ID
-Change frequency channel
-Change PN code
-Change transmission times
-Change working mode
-Change data rate
- Read & change working parameters
-Read & reset manufacturer set up
-Change receiving sensitivity
-Set up password
-Set password valid time
-Sweep envirment noise level
-Set average noise level
-Set reader response delay time
6. Support high density tag handing via time, frequency and code division
7. Support inventory and RTLS at the same time(provide tag location information while doing inventory)
8. Hot disconnection of data port connector is not supported

Reader working parameters:
1. Reader range: >1500meter
2. Input voltage :110-250V AC?
3. Interface connection: water proof connector
4. Packaging: Aluminum case of water proof
5. Working temperature: -35~85degree
6. Transmit current(3V): 400mA-80mA
7. Receiving current: 130mA-100mA
8. Antenna connector type: SMA
9. Receiving sensitivity: -102dBm-97dBm(adjustable)
10.Maximun RF power: 20dBm-4dBm(adjustable)
11.Date Rate:16-250bps (adjustable)
12. Working frequency: 2.4Ghz~2.98Ghz
13. Working band width: 1Mhz
14. Serial Port Date rate: 2400~115200bps(selectable)
15. Communication: DSSS