Fireproof Explosionproof Lipo Battery Safe Bag(7.28&Prime;x3.3&Prime;x2.5&Prime;) with 2 Packs of LiPo Voltage Checker + Warning Buzzer WHAT YOU GET - 1 x Lipo Battery Safe Bag + 2 x Low Voltage Tester Alarm Buzzer Battery Safe Bag Dimensions is 7.3x3.3x2.5 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 Use for 1-8s Lipo/Li-ion/LiMn/Li-Fe. For RC drone/Car Size: 4.0*2.3*1.1 cm; Weight: 10g/1pc Sound intensity:110dB; Range:50m Type: magnetic transducer