best gps

best gps:
1,SiRF III Chipset
2,Tracks up to 20 satellites.
3,Receiver: L1, C/A code
4,Max update rate: 1 HZ
5,Acquisition time
  Reacquisition: 0.1 sec average
  Hot start: 1 sec.
  Warm start: 38 sec.
  Cold start: 42 sec.
6,Position Accuracy Non DGPS (Differential GPS)Position: 5-25 meter CEP without SA
7,Velocity: 0.1 meters/second, without SA
8,Time: 1 microsecond synchronized GPS time
9,DGPS (Differential GPS)
10,Position: 1 to 5 meters
11,Velocity: 0.05 meters/second
12,EGNOS/WAAS/Beacon
13,Position
 < 2.2 meters, horizontal 95% of time
 < 5 meters vertical 95% of time
14,Dynamic Conditions:
 Altitude: 18,000 meters (60,000 feet ) max
 Velocity 515 meters (700 knots) / second max
  Acceleration: 4 G, max
15,Jerk: 20 meters/second, max
16,Antenna Type: Built in Patch Antenna
17,Minimum signal tracked: -159dBm
18,Dimensions: 74 x 25 x 14 mm
19,Operating temperature: -40 to +80
20,Storage temperature: -45 to +100
21,Operating humidity: 5% to 95% No condensing.
22,Power consumption: < 80mA at 4.5- 5.5V input
23,Protocol and interface
24,NMEA output protocol: V.3.0
25,Baud rate: 4800 bps
26,Data bit: 8
27,Parity: N
28,Stop bit: 1
29,Interface: USB port
30,Color: Black
31,Dimensions: 17mm x 41mm x 61.5mm (H x W x L)

best gps:
1,SiRF III chipset. Suitable for UMPC.Laptop.mobile device and Transform them into a GPS navigator