Insize 1140-100WL, MINI DIGITAL DEPTH GAGE WITH ROUND BAR, , 0-4″/0-100mm, built-in wireless, 6940561934649

Resolution .0005″/0.01mm
Accuracy: ?.0010″
No waterproof
Measure depth of small groove and hole
Buttons: on/off, set, inch/mm, preset(+,-)
Automatic power off, move the digital unit to turn on power
Battery CR2032