Dear customer: Thank you for choosing my store for shopping. The following are the matters needing attention for shopping: A. Economic transportation: detailed tracking information will not be included. Most of the packages will cause delayed delivery within the expected delivery time, so you need to be patient B. Each product link: There will be different option variants. If you do nt know how to select the product you want, please contact me, I will be honored to solve this problem for you. C. When you receive the package, there is product damage / product problem / error product and shipping problem, please contact me in time, I will solve it for you D. If you are a r / distributor, a large number of orders and quantities, to provide you with factory prices, and hope to be honored to reach a partner with you GOOGZON store: I wish you a happy life 1.Application: Can be used to measure battery of 1.5V, AA,AAA and 9V, it could be measured whether the electric quantity is enough, directly display measurement results 2.Good quality: Made of good quality plastic, durable for long time use. 3.Easy to carry: Mini size, lightweight, you can put in your backpack or packet for easy storage and carry. Specifications: Size: 5.5*5.3*2.3cm/5.26*5.39*2.34cm Color: black Material: plasti No battery required: directly test and use