Wide operating voltage range The battery monitor is designed to withstand the widest operating voltage range (DC 6 - 63 V). The 12 V 34 , 36 V , 48 V voltage can be adjusted according to the battery level. The test circuit does not require an additional power supply. Screen protector waterproof PVC waterproof case with 15.24 cm two buttons. The function buttons are from capacity, voltage and off. Select the display voltage battery alone or turn the volume percentage to the function button. The "Settings" button is for selecting battery specifications and so on. Clear and bright LCD display The battery monitor delivers crisp, high-quality LCD display from every angle. Automatically enter sleep mode 10s to save power. Reverse polarity protection simply connects with reverse protection and not burn if the connection is reversely. Applicable battery type Battery detector is suitable for lithium battery, lead acid battery such as ternary lithium battery polymer battery lithium ion battery, storage battery. Note that it cannot be used with the LI battery series in lithium iron phosphate batteries 1 - 2 and the LI battery series in more than 15 batteries. Material:ABS plastic colour:black Package Contents: 1 * Digital LCD Battery Capacity Tester 1 * Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.