I just bought this for my h6315 and found out that the h6315 deosn't have serial port.
I paid $65 for everything just a few days ago. 
I'll let it go for $55 shipped to your door.
Please email me at
sillyazynboi@hotmail.com for any question.
This is a wired gps reciever and it will come with the cable to connect it to the ipaq and also will charges it.
Condition: Brand New in original box.
Model: GoPass GPS-201
Included: GoPass 12 Channels High Sensitivity GPS Receiver, Car Charger for GPS and PDA, User Manual, and Tool disc (Mapping software is not included).
The cable bundle with the GPS either for: HP iPAQ RZ17xx / 21xx / 22xx / 24xx / RX37xx / 38xx / 39xx / 41xx / 43xx / 47xx / 51xx / 54xx / 55xx
Here's some spec:
Accuracy:
Position:
5m w/o S/A
Velocity:
0.1 m/sec w/o S/A
Time:
One microsecond
Acquisition :
Cold start:
50 sec (Average)
Warm start:
35 sec (Average)
Hot start:
2 sec (min.)
Sensitivity :
Acquisition:
-157 dBm
Tracking:
-165 dBm
Dynamics :
Altitude:
max. 18,000m
Velocity:
max. 500m/sec
Acceleration
max. +/- 4g
Update Rate :
Once per second
Antenna:
Built-in Patch Antenna
Dimension :
40(W) x 40(L) x 14(H) mm
Interface :
RS232 interface with Mini Din connector
Output Message
NMEA0183 V.2.2 protocol; supporting GGA, GSV, GSA, RMC, VTG (optional) and GLL
Coordinate Datum
WGS 84
Power Supply
+5V DC and up to 9V DC
Power Consumption
120mW - typical (tracking)
Power Saving
Automatic sleep mode power saving
RTC Support
With RTC support
Backup Battery
Lithium rechargeable battery for RTC & SRAM
System Performance
Tracks up to 12 satellites L1, C/A code
Operating Temp.
-40° ~ +85°C
Storage Temp.
-55° ~ +100°C
Humidity
5%~95%
