Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: lap timer
Document: I was able to connect this to both my iPod and Android easily enough. It was compatible with both Trackmate and Harry's Lap Timer and used it with no problem for some easy laps on a track day.Unfortunately, when I actually used it at the Runoffs at Road America it dropped out or mis-recorded several times over the entire race.
I use it it conjunction with Harry's Lap Timer on my IPhone. It works fantastic. I upgraded the unit to read 4 times per second so it sucks power. I installed a 12 volt supply on the motorcycle to power it and it solved the problem of killing the battery. Not the firstGPS unit I've used but definitely the best.
I ordered this to improve the accuarcy of a lap timing application running on an Ipad.It was easy to install (bluetooth) and was a great improvement in sampling rate and accuracy.
Mounted on the dashboard, it gave my iPad GPS information anywhere inside the car. I can have the iPad on my lap while driving and get accurate GPS information.The GPS comes with a pad in order to place the XGPS 150 on the windshield. It also comes with arms straps in order to secure the XGPS 150 to your arm while trekking.A great product and I highly recommend it!
works great and very easy to uselike the ease of connecting to my ipad and or iphone and the info of sat power and position on the app
will only feed GPS data to one device. Would be nice if iPhone and iPad could both get data simultaneously
we bought this for a friend who just started going back to school and needed some help with navigation. She bought TomTom for the iPod and we got her one of these. Works very well, sometimes the TomTom app doesn't think the GPS is available when first started, but it quickly gets corrected by force quoting TomTom and starting it again.it takes about 15-20 seconds from a cold start to be usable for navigation. once it gets locked it seems to stay locked very well.
the bluetooth connection works fine, as is shown by the the dual gps status tool app. but the mapping softwares does not seem to be able to connect to the external gps.
nice design for an IPad on a boat - charge lasts all day - stays put - serves the purpose
look, be careful with this thing in the dash,  the sun can fry it,  easy to forget and leave it there,i really like this and it is now my primary gps, better than cell phone,
Answer: I use to conjunction with my 3GS Iphone and an App called Harrys Lap Timer. I ride motorcycles on the track and the GPS works very well with it. I had to wire in a cigarette port into my bike to power both the phone and the GPS to get any real battery life. Once I did this it worked perfectly I'm very satisfied.