This is a Tower Hobbies Digital LCD Mini Tachometer.

    This Digital Mini-Tach is the perfect addition to any flier's Field Box.
   The Digital Mini-Tach allows you to accurately monitor engine performance
              and evaluate the effects of different fuel and props
                     to improve your model's performance.

FEATURES: Durable ergonomically-designed, durable black case with rubber bumper
            strip increases ease of use and durability.
          Includes two pre-installed "AAA" batteries
          Auto-OFF after 5 minutes, if not in use.
          One-touch switch operation with a protective ring that prevents
            accidentally switching the unit ON in the Field Box
          Operating range 0-32,000 RPM
          Measures 2-, and 3- Bladed props
          Can be used up to 12" away from propeller
          Large easy-to-read .5" (13mm) LCD display
          One Year Limited Warranty through Hobby Services beginning at date of
            purchase

INCLUDES: One LCD Digital Mini-Tachometer

REQUIRES: Nothing, AAA batteries are included.

SPECS:    Length: 3¾"
          Width:  2½"

COMMENTS: Hold tach 4" to 12" away from propeller.
          Uses 2 "AAA" alkaline batteries for replacement when necessary.
          This Tachometer uses a sensitive photocell to measure the number of
            times the propeller blade crosses between the sensor and the light
            from the sun. If the readings become erratic, change the direction
            the model is facing by 90° and take another reading.
            Do not use indoors, reading will not be accurate.
          Instructions are printed on the box.
                                                                    JAL 2/23/00
                                                                          ir/jl
                                                              updt jxs 05/21/10