BT168 Pro Digital Battery Tester Volt Checker for AA AAA 9V Button Multiple Size Battery Tester Voltage Meter ToolsUniversal Battery Checker Tester AA AAA C D 9V Button Checks power level of all 1.5V & 9V batteries Easy to red, colour coded meter indicates power level Tests 1.5V miniature cells Three result: red=replace, yellow=low power, green=good Product advantages: No power supply required, can quickly determine whether the 1.5V, 9V battery is fully , compact and easy to carry Product features: Can measure 1.5V , No. 7 batteries, 9V square batteries, can measure whether the battery is fully , the pointer directly displays the measurement results The color of the indicator on the meter is as follows: Red (RE-PLACE): If the indicator needle points to this block, the battery under test needs to be replaced or recharged, that is, the battery is basically unusable. Yellow (LOW): The battery power is very low, but some electrical appliances can still be used. Green (GOOD): The battery power is sufficient. Colour:black Material:plastic How to use: 1. Connect the 9V battery directly to the two test holes on the side of the tester, pay attention to the positive and negative poles 2. 1.5V , No. 7 battery, please use the hand plate to open the test arm at the top of the tester, insert the battery, and pay attention to the positive and negative poles. Standard configuration: bare meter (no battery required) Please check as much as possible to make sure the item is what you need. Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * Digital Battery Tester 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.