Caliber: https://www.hkec.co.uk/ Calibre E4, using a Qualcomm Snapdragon 4100+ processor, with sensors for heart rate, compass, accelerometer, gyroscope, NFC, microphone, Barometer. At https://www.poptime.co.uk/ launch, the watch will run on Google Wear OS https://www.hubwatches.cz 2; users will have the option to upgrade to Google Wear OS 3 at no extra cost when the update becomes available.