brand new and high quality Features: Protective board has already set the correct strands according your needs firstly,communication port on protective board is use for setting protective voltage or current and other parameters,with strong flexibility. TI front end test chip: high accuracy,ATMEL control chip: low energy consumption,equips with charge and discharge tube,UART communication interface,high integration intelligent lithium battery BMS. This protective board is equipped with bluetooth,you can connect with Bluetooth-for your phone to test it. 7-10 sections electronic series connection for protection;various for protection functions of charging and discharging;intelligent balanced operation of electronic chip,flexible to adjust balanced current according to external components. Temperature for protection in charging or discharging;hardware over-current,short circuit protective treatments. All of protective delay can be set by programming,standard UART interface,and accurately report current battery information. Upper computer software support,flexible to adjust various protective parameters on protective board. Sleeping mode,flexible to control static-current consumption. board only,other accessories demo in the picture are not included! Specification: Type: 30A Polymer Accuracy: 0.001V Application: 13S Intelligent BMS system Constant Discharge Current: 30A Communication Interface: UART Size: app.14x6.3cm/5.51x2.48in Quantity: 1 Set Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Board