Lipo packs will get unreparable damaged when the voltage gets below 2.5V per cell. This Liposaver will give you a clear notice that the pack hits a low voltage, so you will know when it is time to land. This will protect you battery packs!
This Liposaver is suitable for Lipo packs of 11.1V / 3 Cells and will warn you with a bright red led when a voltage of about ~9V is reached.
The complete unit only weighs 3 grams!