It is a ECG EKG Caliper.
High quality of precise instrument.
Fits to measure electrocardiogram wave sections.
Adjustable screws for arms loose and tight.
Brass arms with chrome-plated.
Protective plastic cover， molded ruler for easy reference.
Clip to hold it on your uniform easy to carry.
Features:
Length: 11.5cm
Package Content:
1pc x ECG EKG Caliper
