Please buy the accessary according to customer needs.
If your BMS is 3S and 4S， Please choose 3s 4S Monitor UART Cable,; if your BMS is and gt;= 5S , Kindly choose about 5S USB UART cable
Only buy our BMS, then we can ship the acessary if you buy it.
If you only buy the accessary,we will not ship it because its cost can not cover the shpping cost
Only buy our BMS, And need the Active BMS board, please contact me. Thanks.