Bought to put him on the flight model with on so that it sounds an alarm when the battery becomes empty. The voltage from when he gives signal can be adjusted with a small button. My 2 other Pieper I have no display and are fixed at 3.5V This will also give times like alarm when the Lipos be called just before closing again.
From me bought at Blue Beach with shipping from Hong Kong almost 3 weeks for delivery.
