Cole-Parmer Digital Counter Pen 20610-30 auspowers_batchthree Input supply voltage: DC 10V-55V

Input supply voltage: DC 10V-55V

doesn't block the ear canal

you can also connect a separate 3-pin (TRS) external microphone and powered speakers

These Salt & Pepper Shakers feature a very simple and clean design to pair well with any existing kitchen dcor

Cole-Parmer Digital Counter Pen 20610-30 auspowers_batchthree Input supply voltage: DC 10V-55VCole Parmer Digital Counter Pen 20610 30 Counter pen is a combination marker and digital counter designed for the lab and plant. Use it to count cell growth on petri dishes, inventory parts, and tally samples received. Counter beeps each time a mark is made ensuring an accurate tally. Lcd simultaneously displays total and can be reset at the touch of a button. Durable ABS plastic pen features on off switch and comes with cap. Unit measures 6''l x 2