Description   Compatibility: Compatible with various types of batteries, including LiPo (Lithium Polymer), LiFe (Lithium Iron Phosphate), and Li-ion (Lithium-ion) batteries commonly used in airsoft guns and RC vehicles. Voltage Range: Capable of working with batteries of up to 8 cells (8s), allowing for use with a wide range of battery configurations. Low Voltage Alarm: Equipped with a warning alarm that alerts users when the battery voltage drops below a certain threshold, helping to prevent over-discharging and potential damage to the batteries. LCD Readout: Features an LCD screen that displays cell voltage and total battery voltage, providing users with real-time information about the battery status. Battery Life Prolongation: Provides users with the ability to monitor battery voltage levels effectively, helping to prolong the life of LiPo, LiFe, and Li-ion batteries by preventing over-discharging. Overall, this voltage checker and low voltage alarm is a useful tool for airsoft and RC enthusiasts to monitor and maintain the health of their batteries, ultimately prolonging their lifespan and ensuring optimal performance.