Fitbit Force promo images surface, showing off tracker's digital watch and altimeter - photo 1Fitbit Force promo images surface, showing off tracker's digital watch and altimeter - photo 2Fitbit Force promo images surface, showing off tracker's digital watch and altimeter - photo 3Fitbit Force promo images surface, showing off tracker's digital watch and altimeter - photo 4Fitbit Force promo images surface, showing off tracker's digital watch and altimeter - photo 5Fitbit Force promo images surface, showing off tracker's digital watch and altimeter - photo 6