ITEM NAME:1S-8S Lipo Battery Low Voltage Tester Test VOLTMETRE test monitor Buzzer al E3A4 1S-8S Lipo Battery Low Voltage Tester Test VOLTMETRE test monitor Buzzer al E3A4 Use for 1-8S Lipo / Li-ion / Li-Mn / Li-Fe Voltage detection precision: +/- 0.01V Unit voltage display range. 0.5 ~ 4.5V voltage range display Total: 0.5 ~ 36V 1 S test mode voltage range: 3.7 ~ 30V Mode low alarm voltage for the 2-8 S Alarm set value range: OFF ~ 2.7 ~ 3.8V Size: 39mm x 24mm x 9mm for 1 cell 3.7V and 8 cells LiPo 29.6V. The original alarm voltage is 3.3 v, the min. voltage can be adjusted with the knob. The sounds of alarm and red light to alert you when the battery voltage is too low. It can prevent your lipo battery damage due to low voltage. Package include: 1 x Low voltage alarm Note:Light shooting 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 +/- 1-3 cm.