Matrix PowerWatch 2: Never Charge Your Watch Again – Tech4all - Let's Inspect Cool Tech
PowerWatch 2 Luxe - Smart Watch, sports watch, solar / thermoelectric charge, power control, body temperature measurement, GPS and altitude, iOS and Android : Amazon.de: Electronics & Photo
Matrix's PowerWatch 2 needs no charger, uses body heat and solar power - The Verge
Matrix PowerWatch Series 2 review - The Gadgeteer
Matrix PowerWatch 2 Uses Only Solar And Your Body Heat To Recharge | HotHardware
PowerWatch 2 Smart Watch - Premium Edition, Body Heat Powered Fitness Tracker Smart Watch, Waterproof to 200 m, Skin Temperature, GPS and Altitude, Calorie and Step Count, iOS and Android : Amazon.de: