Polar Vantage M - Advanced GPS HRM Sports Watch for Men and Women - Running and Multisport Training with Wrist-based Heart Rate Monitor (Waterproof, Lightweight Design & Latest Technology)
Polar Verity Sense - Optical Heart Rate Monitor Armband for Sport - ANTPlus and Dual Bluetooth HRM - Waterproof HR Sensor with only One Button (Verity Sense, M-XXL,Grey)