Renogy BT-2 Bluetooth Module for solar charge controller

Bluetooth module for Renogy charge controller. This has been lightly used for less than a year. Please make sure this is the compatible model for your controller. The BT-2 uses an RS485 connector while the BT-2 uses an RJ12. (Note: I'm also offering this as part of a bundle with a Renogy Li 40A MPPT charge controller.)