Important note: When used outside, suburban residential, on water, away from dense tree cover, with clear view of the sky, these GPS units are highly recommended. However, if you are training in an area with a lot of obscured sky, for example in a major city, London, Manchester etc, we would be cautious in recommending the use of the Garmin / Navman GPS type SDM's due to potential weak GPS signal from tall building shadowing. If the majority of your time training is between tall buildings (4 storey or more) on both sides, then it is possible you will suffer loss of satellite signal and the units' accuracy may be compromised.

BHIP Ltd cannot accept a unit back for refund if it's failure is due only to the training environment unless it is in 100% as new condition, including all packaging. If you are training around a "normal" suburban town with 2 - 3 storey buildings either side of the streets, you should be fine. The clearer view of the sky, the higher the level of accuracy. Please bear this in mind the first time you test the unit.