NewsSports&FitnessTechnologyWT | Member New Citizen Smartwatches Will Be Powered by Ambiq Micro’s SPOT Technology By Sam Draper - 15. March 2019 Citizen will unveil its new smartwatch, the Eco-Drive Riiiver which will be powered by Subthreshold Power Optimized Technology (SPOT™) platform, developed by Ambiq Micro, an Austin, Texas-based tech company that […] To access this page, watch the live stream and videos on-demand, you must purchase the Free Subscription, Premium Subscription or Premium Subscription (6 months, special rate).