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Technical specification


Battery type: 240 mAh Li-pol rechargeable battery
Operating time:

In continuous use:

Up to 8 hours continuous training with GPS and optical heart rate

Up to 30 hours continuous training with GPS power save mode and optical heart rate

Operating temperature: -10 °C to +50 °C / 14 °F to 122 °F
Training device materials: Silicon, Thermoplastic polyurethane, Stainless steel, Acrylonitrile butadiene styrene, Glass fiber, Polycarbonate, Polymethyl methacrylate, Liquid crystal polymer
Watch accuracy: Better than ± 0.5 seconds / day at 25 °C / 77 °F temperature
GPS accuracy:

Distance ±2%

These are values that are achieved in open area satellite conditions when there are no apartment buildings or trees blocking the satellite view. In urban or forest areas these values are achievable but may sometimes vary.

Altitude resolution: 1 m
Ascent/Descent resolution: 5 m
Maximum altitude: 9000 m / 29525 ft
Sample rate: 1 s in high accuracy GPS recording, 30 s in medium accuracy GPS recording, 60 s in GPS power save mode
Heart rate measuring range: 15-240 bpm
Current speed display range:

0-399 km/h 247.9 mph

(0-36 km/h or 0-22.5 mph (when measuring speed with Polar stride sensor)

Water resistance: 30 m (suitable for bathing and swimming)
Memory capacity: 60 h training with GPS and heart rate depending on your language settings
Display resolution: 128 x 128

Uses wireless Bluetooth® technology.

Polar FlowSync Software

To use FlowSync software you need a computer with Microsoft Windows or Mac operating system with an internet connection and a free USB port.

Check the latest compatibility information from

Polar Flow mobile application compatibility

Check the latest compatibility information from

Water resistance of Polar products

Most Polar products can be worn when swimming. They are not, however, diving instruments. To maintain water resistance, do not press the buttons of the device under water.

Polar devices with wrist-based heart rate measurement are suitable for swimming and bathing. They will collect your activity data from your wrist movements also when swimming. In our tests, however, we found that the wrist-based heart rate measurement doesn’t work optimally in water, so we cannot recommend wrist-based heart rate measurement for swimming.

In the watch industry, water resistance is generally indicated as meters, which means the static water pressure of that depth. Polar uses this same indication system. Water resistance of Polar products is tested according to International Standard ISO 22810 or IEC60529. Every Polar device that has water resistance indication is tested before the delivery to stand water pressure.

Polar products are divided into four different categories according to their water resistance. Check the back of your Polar product for the water resistance category, and compare it to the chart below. Please note that these definitions do not necessarily apply to products of other manufacturers.

When performing any underwater activity, the dynamic pressure generated by moving in water is greater than the static pressure. This means that moving the product under water subjects it to a greater pressure than if the product were stationary.

Marking on the back of the product Wash splashes,
sweat, raindrops etc.
Bathing and swimming Skin diving with snorkel
(no air tanks)
SCUBA diving
(with air tanks)
Water resistant characteristics
Water resistant IPX7 OK - - - Do not wash with a pressure washer.
Protected against splashes, raindrops etc.
Reference standard: IEC60529.
Water resistant IPX8 OK OK - - Minimum for bathing and swimming.
Reference standard: IEC60529.
Water resistant
Water resistant 20/30/50 meters
Suitable for swimming
OK OK - - Minimum for bathing and swimming.
Reference standard: ISO22810.
Water resistant 100 meters OK OK OK - For frequent use in water but not SCUBA diving.
Reference standard: ISO22810.