Callaway GPSync Golf Watch Pre-loaded with 30,000+ worldwide courses; no subscription or download fees Displays distances to front/center/back of green; and layup/carry distances to hazards and doglegs Other features include auto course recognition; auto hole advance; shot distance measurement; odometer Sync with smartphone (iPhone or Android) to enable text, email, missed call notifications; save/upload round scores and stats to free app Rechargeable lithium-ion battery lasts up to 12 hours in GPS mode;90+ days in time mode