GPS tracking  The trackers weigh just a little under 100 grams! They will be switched on for you on arrival and will stay going for the duration of the event. The interval is set to 5 minutes. The device is waterproof but it is best to protect it and keep it somewhere dry, especially during heavy rain. The device should run for a week when fully charged.  The unit uses GPS satellites and cellular networks to transmit the location data. It is sensitive enough that you can keep it in a bag or pocket. Make sure it is not directly near your smartphone or other GPS devices for best performance.  Your GPS live tracker will be turned on and tested at registration. Your name and number will show up live on the race map on the race Ireland website for friends family, your charity and sponsors to follow in support. Tracker is your responsibility – A lost tracker will cost you €180 to replace.