Large Fireproof Explosionproof RC Lipo Battery Safe Bag Bundle with 2pcs 1-8S Low Voltage Tester Alarm Buzzer WHAT YOU GET - 1 x Lipo Battery Safe Bag + 2 x Low Voltage Tester Alarm Buzzer Battery Safe Bag Dimensions is 9.3x7.3x2.5big enough to fit multiple batteries. Perfect for safely transporting,storing, and charging lipo batteries This Battery Safe Bag using high-quality Fireproof and Explosionproof material to stop and contain any fire caused by incorrectly charging or poorly functioning Lipo packs The Lipo Voltage Checker is for 1-8s Lipo Li-ion LiMn Li-Fe battery detecting automatically battery's each cell voltage and total voltage, can protect the battery from overcharging or overdischarging and test the working state of lithium battery You can set the alarm from 2.7 to 3.8V per cell or you can turn the alarm off