Generally tachometer is a gauge to measure rotation speed of any rotating things. In RC hobby tachometer is the instrument for mesauring and monitoring propeller revolutions per minute (RPM). This tachometer has some additional functionality like: thrust, pitch speed and power estimating.Some features:based on ยตC ATMEL ATmega8L and LPH7366 (Nokia 5110) LCD, RPM measuring range: 100-99990RPM, measuring resolution: 10RPM,measuring accuracy: better than 0.5%,thrust, pitch speed and power estimating,battery discharge indicator,auto switch off,one CR2032 battery powered.

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