Description brand new and high quality.Durable and easy to use. Suitable for repair and replacement of BMS module of MAX G30 electric scooter lithium , with communication protocolThe firmware can be updated online. The MAX G30 model has a built-in communication signal with the controller. Self-made batteries or ordinary packs cannot enable the MAX controller to obtain the communication signal, so the controller refuses to work for safety. Using this for protection module can allow the pack to communicate with the controller normally and drive the electronically controlled vehicle to work. It can protect the safety of charging and discharging. Material: metal+plastic colour: As shown Package Contents: 1 x BMS circuit board 2 x wires Only 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.