Features:1. Plastic shell is broken-resistant, eco-friendly and durable.2. 2 in 1 battery voltage tester / low voltage buzzer is designed for 1-8S Lipl/Li-ion/LiMn/Li-Fe battery.3. Designed to test the working state of lithium battery to keep high-efficiency working state.4. The buzzer alarm is triggered with red LED light when the voltage is lower than the set value. 5. Loud alarm sound and accurate voltage display can prevent over discharge.6. IC chip to automatically save the minimum alarm voltage that user set when power off.7. Small and compact size is easy and convenient to carry.Specifications:Shell Material: PlasticColor: As Picture ShowFor Battery: 1-8S Lipl/Li-ion/LiMn/Li-Fe Battery Voltage Test Accuracy: 0.01VCell Voltage Display: 0.5-4.5VAlarm Voltage Setting: 2.7-3.7VBuzzer Alarm of Low Voltage: 2-8S1S-8S Testing Voltage: 3.7-30VSize: 4 * 2.5 * 1.2cm / 1.6 * 0.98 * 0.5inchWeight: 28gType: RC AccessoryPackage Includes:3 x Lipo Voltage TestersNote:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. 1Plastic shell is broken-resistant, eco-friendly and durable 22 in 1 battery voltage tester / low voltage buzzer is designed for 1-8S Lipl/Li-ion/LiMn/Li-Fe battery 3Designed to test the working state of lithium battery to keep high-efficiency working state 4The buzzer alarm is triggered with red LED light when the voltage is lower than the set value 5Loud alarm sound and accurate voltage display can prevent over discharge