the garmin swim is a clock with sleek profile and compact design created specifically for the practice of swimming. it contains all the advanced functions that allow to automatically get metric data of swimming in pool, swim distance follow-up, rhythm, number and frequency of stroke or stroke. garmin swim includes swimming efficiency meters so it is ideal for all types of swimmers. thanks to ant + technology and usb memory containing the garmin swim, the user may transfer their workout in garmin connect data automatically. thus, you can perform a full analysis and a comparison of their results. physical and performance characteristics:-dimensions: 1.9 "x 0.5" x 1.7 "(4.8 x 1.3 x 4.4 cm). -display size: 1.6 "x 2.2" (4.1 x 5.6 cm); 2.6 "diagonal (6.6 cm). -screen resolution: 55 x 31 pixels. -weight: 1.4 oz (40 g). -battery: cr2032 (user replaceable). -battery life up to 1 year. -waterproof (50 m). -without integrated gps. -sample rate, distance, the type of stroke, the stroke number and efficiency. -score swolf efficiency meter. -no high-sensitivity receiver. -configurable training pages. -automatic detection of break times. -compatible with garmin connect ((comunidad online en la que puedes analizar, clasificar y compartir datos). - automatic synchronization (automatically transfers the workouts to equipment). - storage of data (at least 30 exercises). - includes watch sports. - adicional:funcion of clock are the time of day (12 / 24 h), dual time zone, calendar (day / date), daily alarm.) included in the box: garmin swim, usb ant + stick and quick start guide.