【Smart digital signage】because Automatic data display carousel, can display / current / voltage / power easy to use: precise CPU temperature control, intelligent charging, no adjustment required, automatic charging when the battery is connected to the red power terminals for connecting the battery positive (+) black with clamp for mounting the battery negative (-) Pure copper high frequency transformer: powerful charging 【Multiple protection 】Overvoltage protection, reverse polarity protection (for positive and negative connection faults) Short circuit protection, overcurrent protection, overheat protection, overvoltage protection 【Applicability 】It is strictly forbidden to charge the lithium battery. Suitable for 12V-24V 6AH-150AH lead-acid batteries (AGM, GEL, MF, SLA, VRLA), helps diagnose and repair battery problems in cars, trucks, motorcycles, lawnmowers or boats, and extend battery life. 【Detection Voltage and power detection 】Connect the battery without connecting the power,