Polar A360 Fitness Tracker, Bluetooth Smart Wrist-Based Heart Rate Size:M White | eBay
Amazon.com: RuenTech 2Pcs Band for Polar A360 Replacement Bands, Soft Silicone Strap Sport Wristband Compatible with Polar A360 and A370 Fitness Tracker (Black&Lime) : Electronics
A few quick thoughts on Polar's new A360 with optical HR sensor | DC Rainmaker