Works to 100,000 feet MSL, audibly reports peak altitude and maximum velocity after flight.

Stores 31 flights of 9 minutes each (altitude, temp­erature, and battery voltage at 20 samples per second) for download to a computer with the optional DT4U USB interface.  Data are preserved with power off.

No mach delay necessary for mach+ flights:  Automatic MachLock assures proper operation with any flight.

Built-in rechargeable Lithium Polymer battery.

Precision sensor & 24 bit ADC yield superb 0.1% accuracy.

Built-in voltmeter reports battery voltage on powerup – no more guessing about battery condition.

Post flight locator siren aids in locating your rocket.

Pressure sensor is immune to false triggering from exposure to sunlight.

Highly resistant to false trigger from wind gusts; tested in 100+ MPH winds!

Low power design runs for days on a single charge.  Post-flight locator siren will run for up to two weeks, giving you multiple “second chances” to find a lost rocket.

Telemetry output for real-time data in flight with your RF link.

Rugged SMD construction, stringent QC testing, and internal self-diagnostics assure uncompromising reliability.

Wide operating temperature range of 14F to 140F.

Measures just 2.36"L x 0.63"W x 0.48"H, fits 18mm tube, weighs just 0.26 oz. including battery.

Backed by full three year warranty.