12s 36v(38.4v) 20Amps LiFePO4 BMS
Water Proof Bms
With Thermal Sensor
Support up to 700 watts motor  
12s 20A BMS or battery management system. This bms module is for 32650 or 32700 LiFePO4 Lithium Iron Phosphet Battery. This BMS module is 12S or 36v suitable for 36v HUB motors, gear motors. Max watts that this module can handle is up to 700 watts. SO you can easily use 350 watts, 450 watts, up to 700 watts motor in this BMS module. Module protect your battery from over charge, low discharge and over load. This module will keep your battery healthy and increase the life of battery.
Battery Specification -32650 or 32700
BMS full charge voltage - 44v 
Normal voltage - 38.4v,
Charging Current - Max 10A
Discharge Current- Max 20A
Charger Specification - 44 v
Special Thermal sensor and water proof Bms. 
You can use this module in any AH like 20AH, 50AH also.