Multipurpose applications: the battery capacity voltage meter can show battery capacity, voltage and Celsius temperature/ Fahrenheit, it adopts LCD display screen, clearly displays battery capacity, voltage, temperature value, suitable for for car, , RV, boat, etc Buzzer alarm design: the battery status reader is designed with built-in buzzer 70 decibels, low battery alarm value default power is less than 25 percent, low voltage alarm value 10 - 59.9 V arbitrarily adjustable, sound and light alarm, over temperature alarm value 0 - 79 Celsius adjustable or 0 - 179 Fahrenheit can be any tone, sound and light alarm NTC temperature detection sensor: the external 30 cm probe of digital battery monitor can detect battery temperature in real time, and give an alarm when temperature is abnormal, you just insert sensor into NTC socket, place probe on part where battery is to be measured, and fix it tightly, be careful not to sensor Fits most batteries: the batter gauge indicators are compatible with 12V, 24V, 36V, 48V, 60V, 72V, 84V lead acid battery, lithium battery, polymer lithium- battery, 3 - lithium battery, storage battery, water battery, lithium iron phosphate batteries and more Protective function: the battery power detector comes with protective shell, dustproof and waterproof surface, input reverse connection protection, red wire is positive and black wire is negative, the white plug with electronic protection goes to socket of tester Working voltage:10 - 100 V Power consumption: 8 - 10 mA Working temperature: -10 Celsius to 55 Celsius Temperature testing range: 0 - 179 Fahrenheit Working temperature: -10 - 65 Celsius Product size: 61.5 x 33.5 x 13.5 mm Installation dimension: 58.5 x 28.5 mm Display size: 33 x 16.5 mm :Black Material:ABS Package Contents: 1 x Battery capacity voltage Only above package content, other are not included. Note: Light and different displays may cause color of item in a little different from real . The measurement allowed is +/- 1-3cm.