It is suitable for the repair and replacement of the BMS module of the lithium battery of the for MAX G30 electric scooter, with a communication protocol, and the firmware can be updated online.The for MAX G30 battery has a built-in communication signal with the controller. Self-made batteries or ordinary battery packs cannot enable the MAX controller to obtain the communication signal, so the controller refuses to work for safety.Using this battery protection module can allow the battery pack to communicate with the controller normally, drive the electronically controlled vehicle to work, and protect the safety of battery charging and discharging.Material: PCBcolour: greenPackage Contents:1 x BMS Battery ControllerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.