Features 1、EXCELLENT DESIGN: The battery tester adopts acrylic shell baffle design to make the tester durable and beautiful 2、TEST DETAILS: The battery tester supports 1 to 24S lithium battery packs(battery voltages range from 2V to 4.5V), with an accuracy of about 0.003V for each battery string 3、DATA DISPLAY: The battery tester displays each string voltage, total voltage, maximum string voltage, minimum string voltage, maximum voltage difference of the battery pack, average voltage, balance voltage, battery string number 4、AUDIBLE ALARM: This battery tester has reverse connection, high voltage warning and prompt(greater than 4.5V), low voltage(less than 2V) 5、EASY TO USE: The battery tester supports hybrid plug(no need to start from B1), supports C type and DC power mode(DC5V), support Chinese and English switching, more convenient to use Specification Item Type: Lithium Battery Voltage Detector Support Battery: 1S~24S lithium battery pack(DC2V~DC4.5V battery) Accuracy of Each String Voltage: About 0.003V Warning: Reverse connection, high voltage(greater than DC4.5V), low voltage (less than DC2V) warning sound and prompt Power Supply: Type C and DC(supply voltage DC5V) Mix Up: Support(don't start with B1) Language: Chinese or English(switch) Package List 1 x Host 1 x USB Cable 1 x Expansion Board