The test video is no load, so the speed can reach 40km/h, but the riding speed can only reach 35km/h. 

Please choose based on your vehicle model. ZT3 PRO E is European version.
Please do not choose the wrong option, as it will result in the inability to use.
If you don't know your scooter model, please check according to the list below.

Important Tips:Please read all the following carefully before order.

1.The high performance unlock speed cable (35km/h version) :
You can use it directly after installation without any additional configuration.

2.Compatible with the latest APP V1.4.11 or higher versions,You can use it directly after installation without any additional configuration.

3.The actual riding max speed is affected by many factors like the playfield,battery level,especially the battery level and weight of the rider,the lighter the rider, the fast the max riding speed.