Product Name: Smart Battery Management System PCM/BMS with RS232/RS485/Uart Communication for 3s-4s Cells Model NO.: PCM-L04S20-E07 Dimension: L90*W64*T8mm Apply to: 2s to 4s Lithium Ion Batteries Max.Cont. Discharge Current: 20A Charge&Discharge: Share a Same Port Communications Type: Canbus/RS232/RS485/Bluetooth Delivery Time: 7-15 Working Days ODM/OEM Services: Yes Ti IC Type: Bq40z50 Work with LCD Screen: to Read Battery Data Connect with Bluetooth: to Read on Battery Data on APP Connect with Mobile Phone: to Read Battery Data Trademark: SmarTEC Transport Package: Antistatic Bag Specification: For Li-ion/LiFePO4 battery Origin: Shenzhen Product Description Product Features:1. Have the Basic Functions of a normal battery protection circuit:2.Have more Intelligent functions to monitor the batteries :Howto produce? Certificates: who we are? A great Team to support you high quality products, fast delivery time, good after-sales services!