Small enough for power. A micro grinder that is easy to use by USB charging.
3 revolutions You can also check the number of revolutions with the lamp.
Collet zipper closure makes it easy to put on and take off.
Rotational Speed: 4000/9000/14000rpm
Power supply: 3.6 V lithium-ion battery
Charging: Micro USB
Charging time: 2 hours (at 5 V).
Dimensions: φ31 x 145 mm
Weight: 3.2 oz (90
Operating Time: 15 minutes.
Accessories:
Hand router main unit x 1, USB charging cable x 1, whetstone bit x 2, diamond bit x 2, thunder band x 4, drum for thunderband, collet chuck φ2.35, collet chuck φ3, instruction manual (English language not guaranteed)