Specification: Origin: Mainland China Type: Module Condition: New There are many batteries at home, and it's difficult to distinguish how much electricity each one has left? It's a pity to throw it away, not throwing it away takes up space! This battery tester is easy to use. Insert the tested battery into the battery compartment and display the actual battery level intuitively and accurately through the number of lights on! Usage: Insert the battery into the battery box and determine the battery level based on the indicator light. Light up 4 lights: fully charged Three lights on: there is still a lot of battery Two lights on: low battery, low-power appliances such as mouse and remote control can still be used Turn on one light: almost out of battery, suggest replacing it Product size: 58.00x17.00x14.00mm Product size: 2.28x0.67x0.55inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Battery Level Tester 1.Accurate Power Measurement: This battery level tester is equipped with four indicator lights, providing a more accurate measurement of the battery level. The user-friendly design allows you to check the remaining power at a glance, ensuring you're never caught off guard by a low battery. 2.Convenient and Cost-Effective: Designed with practicality in mind, this battery capacity tester offers high value for its cost. It delivers reliable performance and durability, making it an economical choice for those seeking high-quality power solutions. 3.Versatility: This battery power tester is compatible with both size 5 and size 7 batteries, providing users with enhanced flexibility for their power needs. Its ability to accommodate different types of batteries makes it a versatile choice for a range of devices. 4.Compact Size: The battery tester checker's small and lightweight design makes it easy to carry around, ensuring that you can measure power levels anytime, anywhere. Its portability makes it a perfect tool for both home and professional use. 5.Ease of Use: With its intuitive and easy-to-understand features, this battery monitor can be used by anyone with minimal effort. With the convenience and practicality it offers, it makes power measurement a breeze, making it a must-have tool for everyone.