Technical specification

Battery
Operating time with full charge	Up to 8 days with 24/7 activity tracking and 1h/day training (without smart notifications) Up to 3 days with 24/7 activity tracking and 1h/day training (with smart notifications)
Type	38 mAh Lithium-polymer, rechargeable, non-replaceable.
Charging	USB compliant power supply or computer USB port equipped with USB type A connector.
Charging time to full	90 minutes

Memory
Capacity	4 Mb
Examples	12 days of activity and 4 one hour training sessions or 7 days of activity and 8 one hour training sessions.

Communication
USB	Polar custom USB cable The Polar Loop 2 end of the cable is magnetized: keep it away from credit cards and iron objects.
Wireless	Bluetooth Smart®

General
Operating temperature:	0 °C to +50 °C / 32 °F to 122 °F
Charging temperature:	0 °C to +45 °C / 32 °F to 113 °F
Accuracy of heart rate monitor:	± 1 bpm. Definition applies to stable conditions.
Heart rate measuring range:	15-240 bpm

Water resistance
Polar Loop 2	20 m Suitable for bathing and swimming

Size
Circumference White and pink bracelets	Min. 140 mm / 5.5 inch Max. 220 mm / 8.7 inch
Circumference Black bracelet	Min. 145 mm / 5.7 inch Max. 240 mm / 9.4 inch
Weight	38 g / 1.34 oz
Width	20 mm / 0.8 inch

Display
85 LED lights in 5 x 17 matrix

Button
Capacitive touch button

Sensors
3D accelerometer

Bracelet Materials
Front plate and band	Silicone (pink and white models), Thermoplastic polyurethane (black model)
Front plate decoration parts	Acrylonitrile butadiene styrene + electro plating,
Back plate	Glass fiber, Polycarbonate
Back plate screws	Stainless steel
Back plate connector parts	Stainless steel
Buckle	Stainless steel

 

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 support.polar.com.

Polar Flow mobile application compatibility

Check the latest compatibility information from support.polar.com.

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.