1. Power supply: 4 size AA bateries.
2. Machine size: 140(L) x 25(W)mm.
3. RPM: 16000-18000.
1. Function: engraves any surface. 2. Power supply: 4 size AA bateries. 3. Machine size: 140(L) x 25(W)mm. 4. Machine weight: 0.135kgs. 5. Body material: ABS. 6. RPM: 16000-18000. 7. Accessories: with 1 tips. 8. Packing: double blister inner: 6 pcs carton: 72 pcs N.W.: 9.7 kgs G.W.: 11.7 kgs Cuft: 2.56’.