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Each Pachette 4 pachymeter includes an electronic calibration standard
The Stereo Butterfly tests and evaluates random dot stereo depth perception for both gross stereopsis (2500 to 1200 seconds of arc) and fine depth perception
The Pachmate 2 has a minimum lifetime of 10 years and an industry leading 3-year warranty
It is not necessary to set up or configure any parameters
R type post
Used Rechargeable Handle 0.4mm Each Pachette 4 pachymeter includesWelch Allyn's 71670 3. 5V rechargeable handle Features: Accepts all Welch Allyn 3. 5v instrument heads. Recharges in the Welch Allyn desk charger and numerous stand consoles and well chargers. Includes 1 battery All of our used equipment comes with a 30 day warranty *handle will have either a green or red button.