The Renogy BT-1 Bluetooth Module (New Version) pairs great with any compatible Renogy solar charge controller. This updated model boasts an increased signal range of up to 82 feet and an additional LED to indicate when your devices have synced. Plug the BT-1 into your controller's RJ12 port to seamlessly monitor and change settings straight from your smart device through the DC Home App (available in both the App Store and Google Play).