Firefly Altimeter

The FireFly is a tiny, light-weight altimeter that reports your rocket's peak altitude & speed through a series of blinks. When used with the optional Field Data Display, it also reports time to apogee, total flight time, and descent rate. The high accuracy, low price, and simple operation make the FireFly ideal for rocketry education programs requiring precise, repeatable data even within the constraints of limited school budgets. • Works to 30,480m MSL, reports peak altitude and maximum speed after flight. • Unlike many other low cost altimeters, each unit is individually calibrated for superb accuracy, repeatability, and interchangeability. • Highly resistant to false trigger from exposure to sunlight and wind gusts; tested in 160+ kph winds! • Uses standard 3 volt "CR1025" size lithium button cell (included), battery life of 30+ hours. •Wide operating temperature range of 0 to 66 C. •Measures just 27.5mm L x 17mm W x 7.75mm deep, fits in 18mm (BT20) tube, weighs just 3.5g including battery. •Rugged SMD construction, stringent QC testing, and internal self-diagnostics assure uncompromising reliability. •Backed by full three year warranty