Research Stopwatch with Earpiece which allows the timing of a subject without disturbing it. For captive and field research, or in classrooms. The alarm is audible only through a headphone. Headphone Alarm
Will Not Disturbed Research Subject
Count Up / Count Down
Interval Alarms
Automatic Countdown Repeat

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3 inch
Height : 1 inch
Length : 5.3 inch

Shipping Weight: 15.98 ounce (View shipping rates and policies)
ASIN : B00WKJ0VDU