very good BMS with integrated active balancer. I love this product an using 5 of them in different versions at my DIY 18650 powerwall. I can recommend the 150A / 2A version and the small one with 60A / 0,6A negative aspect 1: manual is horrible and many parts are missing including password to change settings and all the options of the BMS - only the balancer settings are explained. It's definetely worth to work on the manual negative aspect 2: the app has some bugs. Some values can't be changed, so the app needs some improvements too. In short: good hardware but poor manual and software
Very fast shipping .