What's this green button by odb2 port?

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Small device attached under steering wheel of Camaro ZL1 near OBD-II port. Friend purchased this car in Colorado, previous owner told him it was required in state. (Approx 2 square) : r/whatisthisthing

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THINKCHECK M43-OBD2 All System Scanner Vehicle Diagnostic Car Code Reader Tablet Professional Automotive Diagnostic Tool for ABS, SRS, ECM, TCM — THINKCAR

When I press a laptop's power button, the indicator light blinks but the laptop isn't on. How can I fix it? - Quora

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Saw this plugged in to my OBD2 port…is someone tracking my car? It's completely unlabeled. : r/Cartalk

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