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Onboard optical voltage monitor for 4 or 5 cell receiver batteries. Ultra-bright twelve segment LED bar monitors voltage in three ranges: yellow(full battery), orange(voltage dropping), and red(very low voltage). Memory function shows current battery voltage as well as lowest voltage measured in flight. Connect to unused servo output on receiver. Factory setting: Coding jumper open for 4 cells. Solder closed jumper for 5 cell monitoring. Mounting holes are in each end of the monitor. SKU Number: EVO0790
 "evoJet Orbit M-Saver Ultra")