Both watches include a host of features for runners, including integrated GPS receivers, multiple running profiles, running performance tests, a new walking test that is great for first-time runners, a running index, advanced sleep-tracking, music controls for music playing from your connected phone, smartphone notifications, and long battery life (35 hours with full GPS and heart rate tracking enabled). There are available in compelling colors and are very lightweight watches for all runners. The Polar Pacer weighs in at 40g and the Pacer Pro at just 41g. Also: Best sports watch: Garmin, Coros, Polar, and more Sander Werring, CEO of Polar Electro, stated: Also: Polar Grit X Pro Titan review: Informed training, recovery, and testing on a premium watch The Polar Pacer Pro is available today in Carbon Gray, Snow White, Midnight Blue, and Autumn Maroon. An Aurora Green color will be available later this year. The Polar Pacer is available for pre-order with shipping starting in May. Available colors include Night Black, Cloud White, Deep Teal, and Purple Dusk. The Pacer Pro works with the Polar Shift adapter, included in the retail package, and 20mm bands, but by default, it has custom silicone bands. The Polar Pacer works out of the box with standard 20mm bands. The Polar Pacer Pro is priced $100 more than the Pacer and includes some advanced functions, including running power from the wrist, a barometer for Hill Splitter functionality, and mapping through Komoot. Polar has advanced heart rate sensors on the back of both watches that help provide you with recovery guidance and coach you to your best performance.