Meet the LifeBEAM Smart Visor: a smart wearable device that measures your heart rate, calories consumption, and cadence/steps without a chest strap. Its optical heart-rate sensor is integrated into the visor. This smart visor connects wirelessly to smartphones, smartwatches, and cycling computers via Bluetooth 4.0 and ANT+.
The device runs 15 hours when fully charged. It also provides you with a sound and light user interface. It can be yours for $99.