Go the extra mile on your next ride with the world39s smallest and lightest gps cycling computers the edge 25 hrm bundle at just 25g you39ll not notice a weight penalty these gps glonass enabled bike computers track how far how fast and where you ride more accurately than ever before up to 8 hours battery life ipx7 water rated extremely durable and small in size they are perfect for travel and ideal for training and everyday riding the edge 25 adds ant and bluetooth capab