About This [DALY BMS]Overcurrent,Overcharge,Overdischarge,Short circuit, Temperature protection.DALY BMS maximizes optimizes the lithium battery performance, and extends the battery lifetime to a large extent. [Double Protection]Double protection by injection patent technology and patent shell.Waterproof,dustproof,shockproof and anti-static;High-quality components, pressure-resistant and durable material, high acquisition accuracy.Easy to install. [Smart BMS]Check battery status and modify parameters at any time through Bluetooth app or PC Software.Quality Guarantee--- ISO/ FCC/ RoHS/ PSE/ CE APPROVED [Note] If you need active balancer, parallel module or other accessories, please contact online customer service.We offer 24-hour one-on-one customer service and lifetime technical support. [Packing List]3.2V Lifepo4 BMS*1,Bluetooth Module*1,NTC sensor*1,Sampling cable*1,Uart cable*1,Instruction Manual*1. Overview Brand : DALY Color : Smart BMS Input Voltage : 12 Volts Item dimensions L x W x H : 7.24 x 2.56 x 1.3 inches Output Voltage : 12 Volts