The HRN-CT20T1 is an OBDII adapter for a 2018 Tesla Model 3 only, to connect to the OBD2/Diagnostic port.
If you are looking for an adapter for the 2019 – 2020 Tesla Model 3, you need to purchase the HRN-CT20T11.
Length: 30 cm / 12 inches
Max length of connected cables: 2 meters / 6.5 feet
Other Tesla Adapters
2012-2015 Tesla Model S OBDII Adapter
2015+ Tesla Model S OBDII Adapter
Tesla Model X OBDII Adapter
2019 – 2020 Tesla Model 3 OBDII Adapter
Overview of Tesla OBDII Adapters
Geotab Features for Electric Vehicles