Reverse connect protection: Reverse connect protection protrcts your devices, extending the life of device. Easy to operate: The item only has 2 wires,, 2 key for your operation. Alarm: The indicator flashes and buzzer alarm when it is low or battery voltage, the low/ high voltage can be setting. Voltage measurement range: DC 8V-100V Working electric current: less than 15MA Display: LCD screen Display color: white/blue Measurement accuracy: 1% +/- 1 digit Measurement speed: .2 times per second Operating temperature:-10~+70℃ Working humidity:10~80%(No condensation) Working pressure:80~106kPa Installation size: 58x28mm Size: 61x33x15mm colour: as shown Material: plastic Package Contents: 1 x battery capacity voltage tester 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. The ternary lithium battery L measurement: Measurment ranges from L02 to 25, with power off memory function. Lead acid battery P measurement: Measurement range can be from DC12V to 24V, 36V, 48V, 60V, 72V, 84V, with power off memory function. The lithium iron battery pack F: can measure F03 string to 26 string, with power off memory function. Wide application: Widely used in most instrument, electromobile, balance car and more. LCD display: The battery monitor adopts LCD screen, can long-term display the battery capacity, voltage, temperature, convenient to use in a variety of lighting conditions.