Please note (very important): 1. The upgraded battery tester can be used without a coin cell battery (if you received an upgraded battery tester, you do not need to install a battery) 2. The upgraded battery tester does not support the detection of rechargeable batteries and carbon-zinc batteries (R). The battery marked with the letter R is a carbon-zinc battery, please check it yourself before purchasing. If you have any questions, please contact our customer service to answer your questions. Material: ABS Color: silver, black Size: 92*63*14mm feature: Easy to read: LCD bar graph display, easy for you to read. Material: ABS structure, durable. Function: ★ Upgrade: ➤ Wide range of tests, including C, AA, AAA, D, N, 9V (6F22) batteries and 1.5V buttons 9V: PP3, MN1604, 6F22, 006P 1.5V: AAA, HP16, MN2400, R03 AA, HP7, MN1500, UM3 C, HP11, MN1400, SP11, LR14, UM2 D, HP2, MN1300, SP2, R20, UM1 various button batteries Package includes: 1* Digital Battery Tester