Hobbymate 3 Cells Lipo Battery Low Voltage Alarm, indicator, Warning alarm
Dimension: 12.5*16.8*32 mmWeight: 5.6 gramsKeep your battery safe and remind you before over discharged, Best investment for any RC Hobbies. Even if your ESC has a built-in Low Voltage Cut-off, this is like an extra insurance of protection for your model and expensive Lipo batteries, just in case your built-in ESC LVC gone wrong.