This is the Altimeter Micro Sensor V4 from Eagle Tree Systems.

FEATURES: Uses barometric pressure to measure altitude of radio control model
            aircraft
          May be used in standalone mode or with the Eagle Tree Systems V3 or
            V4 eLogger
          Displays maximum altitude on the built-in 7-segment LED display when
            used in standalone mode
          When connected to the V3 or V4 eLogger, altitude data can be
            downloaded, displayed and graphed using the eLogger's Windows
            software
          Precalibrated, no user calibration required
          Advanced temperature compensation
          Metric or english units
          One year limited warranty through Eagle Tree Systems beginning at
            date of purchase

INCLUDES: Altimeter Microsensor with Standalone Cable, eLogger Cable and
            Instruction Manual

SPECS:    Altitude Limit: Approx. 20,000 feet (6096m) above sea level
          Resolution: Approx. +/- foot (0.3m)
          Power Input: 4-16V (standalone mode)
          Weight: 0.15oz (4g)
          Dimensions: 1.1 x 0.62 x 0.4" (28 x 16 x 10mm)

COMMENTS: Not compatible with the V1 or V2 versions of the eLogger

                                                                   jxs 11/02/11
                                                                         ir/jxs