Simply put, a SentinelX improves the validity and value of data.
With COIN, a SentinelX is considered a "Sentinel eXtension" device, because it is an extension of the verifications you make with your phone when you use the app. When you scan or connect a SentinelX, you're showing COIN app that you, a real person, are providing real data, in a real place in the world.
Benefits
In exchange for providing more valuable data, you'll earn 12x more when you Geomine after scanning or connecting a SentinelX via Bluetooth. If you have a premium subscription, you automatically receive the 12x bonus as a benefit of your subscription. In this case, your 12x boost from the SentinelX will instead be a 10% boost.
Multiple Sentinels
You only need one SentinelX nearby to earn 12x the rewards. Having more than one SentinelX detected won't multiply the rewards. If you have additional SentinelX's you do not use, try SentinelX Sharing! With SentinelX Sharing, you can earn more from friends. You can learn more about SentinelX Sharing here: What is SentinelX Sharing?
Have a SentinelX? See the setup guides below.