Flug51 FL117 - 1s-8s Lipo RC Li-ion Li-Fe LiMn Battery Tester Low Voltage Buzzer LED meter checker with alarm and voltage indication (Toys)
Good LiPo Warner with audible and visual signal. Adjustable lower limit of the battery voltage. Suitable 8S LiPo's - for 1s. Really very very loud beeps that are still good to hear from a distance.
