1. Innovative touch switch design: Adopting touch switch technology, easy and sensitive operation, can turn on or off the indicator, enhance user experience and extend the service life of traditional buttons. 2. All-round battery applicability: widely applicable to all types of batteries, including acid batteries, lithium ternary batteries, lithium iron batteries, etc., with strong compatibility, providing convenient power monitoring solutions for different application scenarios. 3. Wide Voltage Measurement Range DC 8~100V: Supporting a wide range of voltage measurement from as low as 8V to as high as 100V, it can accurately measure whether it is a small electronic device or a high-voltage power supply system to meet diversified needs. 4. Safe and secure anti-reverse connection protection: Built-in advanced anti-reverse connection circuit protection mechanism, even in the event of misuse of reverse power polarity can automatically cut off the circuit, effectively preventing damage to the equipment, to protect the use of safe and worry-free. 5. Wide range of applications: With its excellent performance and flexibility, this voltage and power indicator can be widely used in high and low distribution cabinet monitoring, industrial assembly line testing, precision electronic maintenance and electronic DIY enthusiasts projects, which makes it an ideal testing tool for -industry fields. Voltage measurement range: DC 8~100V Measurement accuracy/grade: (0.2% + 2) Power supply current: 2A Product Size: 47.6X28.7X19.4mm Lithium ternary battery (L) Measurement: 3S~20S (power failure memory) Acid battery (P) measurement: DC12V/24V/36V/48V/60V/72V (power failure memory) Note: Due to different production batches, there may be slight differences in products. Colour:Black Material:plastic Character Specifications:A: blue Package Contents: 1 indicator Only the above package content, other products are not included. Note: Light reflection 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.