Compact in size and very handy to use. 2-9 blade prop.
NEW tachometer with data memorizing and low voltage alarming function
Multiply the readout by 10 for final rpm reading, it shows 4 digitals in a 10-99.999 rpm range
Including replaceable 3V Lithium battery.
Auto shut-off function after five minutes when no signal received.
Display and memorize the maximum rpm value.
It needs a little electronic power (20uA) when the tachometer is not in use. This depends on battery’s capacity for life of battery