Model Number: A-S500-2 Brand Name: Asir Key Specifications/Special Features: What's new?1, Smaller size: as small as a car remote controller so that it can be linked to the key chain.2, Longer battery lifespan (standby time is 200 hours)3, Accurate position will combine the GPS info and GSM base station info.4, By pressing call 1 (blue LED will flash) to turn up the volume and pressing call 2 (yellow LED will flash) to turn down the volume.5, Get position by 3 ways: Search the coordinate in Google Map, click the URL and see the position in cell phone directly and view the position and history in tracking software. Specifications:Dimension : 67*40*18mmWeight: 56.4GNetwork: GSM/GPRSBand: 850/900/1800/1900Mhz
GPS chip: SIRF3 chip
GPS sensitivity: -159dBM
GPS accuracy: 5M
Cold start: 42sec.
Warm start: 38sec.
Hot start: 1sec.
Battery: chargeable 3.7 V 1700mAh
Operation temperature: -20°C to + 55°C
Humidity: 5%-95% non-condensing

Main features:
1, Locating and tracking via SMS or GPRS
2, Supports voice call
3, Listen in function
4, SOS alert
5, Geo-fence alert
6, Speeding alert
7, Low battery alert
8, Combine the GPS info and GSM base station info ( customer should offer the base station data)
9, Position transmit

Applications:
1, Protect the child/elderly/disabled/pets and more
2, Personnel management
3, Track the vehicle/equipment and more
4, Provide peace-of-mind for businessman
5, Tracking system for express/carriers/logistics