This LCD unit IS NOT a remote BMS programmer,. It is only a "3 page" touchscreen monitor. For remote BMS programming you need to use either a Bluetooth app to a phone (there's lots which work on the JBD), or a PC program like "JBD Tools" or "Sinowealth".

Product as described fast shipping the only comment is it's four pin not 6 pin. Like most UART connections. Would buy from vendor again.